Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, hieu ve
thanh di » thanh doi, thanh de, thanh do
duc ban » duc tan, duc van, dua ban
lam duc » lam duoc, pham duc, nam duoc
cua tre » cua te, cuu tre, cua triet
tang ha » lang ha, tang ma, trung ha
ke tang » ke trang, ke thang, le tang
tu sach » thu sach, su sach, te sach
ha hoi » hoa hoi, ha noi, xa hoi
di cua » dai cua, doi cua, de cua
tu sac » tu cac, tu san, tu bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu sach)) ke tang ha hoi. ((hieu van) or (lieu va)) lam duc ban thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ke tang ha hoi. ((hieu van) OR (lieu va)) lam duc ban thanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ke tang ha hoi. ((hieu van) or (lieu va)) lam duc ban thanh di cua tre*".