Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
lam duoc » nam duoc, luat duoc, lam thuoc
nang ha » nang hai, nang han, nang hoa
hieu va » lieu va, hieu qua
va tinh » may tinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
su cac » tu cac, su cao, su can
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: su cac ky nang ha hoi. ((hieu van) OR (hieu va)) lam duoc ((le thanh) or (va tinh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang ha hoi. ((hieu van) OR (hieu va)) lam duoc ((le thanh) OR (va tinh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang ha hoi. ((hieu van) OR (hieu va)) lam duoc ((le thanh) or (va tinh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su cac ky nang ha hoi. ((hieu van) OR (hieu va)) lam duoc ((le thanh) or (va tinh)) hai cua tre*.