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