Perhaps you should try some spelling variations:
thanh dieu » thanh lieu, than dieu, hanh dieu
ban thanh » ban hanh, ban hang
dieu cua » dieu tra
hieu van » thien van, hieu ve
cua tre » cua te, cuu tre, cua triet
lam duc » lam duoc, pham duc, nam duoc
ky tang » ky nang, ky dang, kho tang
tang ha » lang ha, tang ma, trung ha
hieu va » hieu qua
duc ban » duc tan, duc van, dua ban
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ha hoi » hoa hoi, ha noi, xa hoi

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

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