Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cong tac » cong ty
hieu van » hieu va, thien van, lieu va
sach de » cach de, sach dao, sach dat
tac hoi » tao hoi, tay hoi, tac hai
sach ke » sach kem, sach che, sach tet
van lam » van nam
lam xuc » cam xuc, lam duoc
anh bai » sach bai, danh bat, hinh bai
xuc va » duc va, tuc va, luc va
anh va » hanh 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 ke) OR (sach de)) cong tac hoi. hieu van lam xuc va ((anh bai) or (anh va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ke) OR (sach de)) cong tac hoi. hieu van lam xuc va ((anh bai) OR (anh va)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ke) OR (sach de)) cong tac hoi. hieu van lam xuc va ((anh bai) or (anh va)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ke) OR (sach de)) cong tac hoi. hieu van lam xuc va ((anh bai) or (anh va)) cua triet*.