Perhaps you should try some spelling variations:
ve triet » va trien, su triet
tang van » dang van, hoang van, trong van
ty tang » tay tang, ty xang, ty hang
so sanh » do sanh
van hoi » van hoa, van hoc, van hoe
qua cam » qua cham, qua cac, qua ca
hanh vu » hanh vi, hanh va, hanh tu
so sach » bo sach, co sach, hoc sach
lo van » vo van, so van, do van
vu ve » vu le, vu va, su ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (so sanh)) ty tang van hoi. hieu qua cam ((lo van) or (le van)) hanh vu ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty tang van hoi. hieu qua cam ((lo van) OR (le van)) hanh vu ve triet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ty tang van hoi. hieu qua cam ((lo van) or (le van)) hanh vu ve triet*.