Perhaps you should try some spelling variations:
"advanced validation in planning problem" » "advanced oxidation in planning problem" (Expand search), "advanced glication in planning problem" (Expand search), "advanced visualization in planning problem" (Expand search), "advanced validation in packing problem" (Expand search), "advanced validation in planning process" (Expand search), "advanced validation and planning problem" (Expand search), "advanced validation of planning problem" (Expand search), "advanced validation _ planning problem" (Expand search)
"advanced python programming coding program" » "advanced python programming using program" (Expand search), "advanced python programming code program" (Expand search), "advanced python programming computing program" (Expand search), "advanced method programming coding program" (Expand search), "advanced path programming coding program" (Expand search), "advanced symphony programming coding program" (Expand search), "advanced python programming cloning program" (Expand search), "advanced python programming loading program" (Expand search), "advanced python programming cooling programs" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("advanced validation in planning problem") OR ("advanced python programming coding program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced validation in planning problem\") OR (\"advanced python programming coding program\"))*".
• Removing quotes may allow a broader search: (( advanced validation in planning problem ) OR ( advanced python programming coding program ))*.