Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh via » hanh vi, hanh va, anh va
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, xach tay
via cua » gia cua, gian cua, giau cua
van lam » van nam
tuc va » thuc va, truc va, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ty) or (sach thu)) lang xa hoi. hieu van lam ((tuc va) or (tuc xa)) hanh via cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach thu)) lang xa hoi. hieu van lam ((tuc va) OR (tuc xa)) hanh via cua triet.
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) or (sach thu)) lang xa hoi. hieu van lam ((tuc va) or (tuc xa)) hanh via cua triet*.