Perhaps you should try some spelling variations:
trong van » trong cac
tang van » dang van, hoang van, tang luan
qua pham » quan pham, quy pham, qua cham
pham duy » pham duc
va hanh » van hanh, va thanh, va danh
duy va » duy vat, duy van, day va
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) OR (do sanh)) thu ((tang van) or (trong van)) hoi. hieu qua pham duy va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (do sanh)) thu ((tang van) OR (trong van)) hoi. hieu qua pham duy va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) OR (do sanh)) thu ((tang van) or (trong van)) hoi. hieu qua pham duy va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sanh) OR (do sanh)) thu ((tang van) or (trong van)) hoi. hieu qua pham duy va hanh vi cua te*.