Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam luc » cau luc
kem cua » em cua, keo cua, diem cua
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang xa hoi. ((hieu ve) or (hieu va)) ((cam luc) or (cam xuc)) van hanh kem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. ((hieu ve) OR (hieu va)) ((cam luc) OR (cam xuc)) van hanh kem cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. ((hieu ve) or (hieu va)) ((cam luc) or (cam xuc)) van hanh kem cua tre*.