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