Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
hieu van » hieu va, thien van, lieu va
hanh cao » hanh cac, hanh cat, hanh cad
te sach » toc sach
nang ma » tang ma, sang ma, mang may
van cam » van nam, van lam, van cau
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang ma) OR (nang cao)) hoi. hieu van cam ((xuc va) or (duc va)) hanh cao chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang ma) OR (nang cao)) hoi. hieu van cam ((xuc va) OR (duc va)) hanh cao chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang ma) OR (nang cao)) hoi. hieu van cam ((xuc va) or (duc va)) hanh cao chat triet".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang ma) OR (nang cao)) hoi. hieu van cam ((xuc va) or (duc va)) hanh cao chat triet*.