Perhaps you should try some spelling variations:
ban thanh » ban hang
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
cam duc » cam xuc, cao duc, pham duc
hai cuu » hai cua, hai chu, hai cuc
cuu tre » cua tre, cau tren, cau treo
su sac » su sach, su cac, su xac
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: su sac ky nang xa hoi. ((hieu van) OR (thien van)) cam duc ((ban thanh) or (ban hanh)) hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. ((hieu van) OR (thien van)) cam duc ((ban thanh) OR (ban hanh)) hai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. ((hieu van) OR (thien van)) cam duc ((ban thanh) or (ban hanh)) hai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. ((hieu van) OR (thien van)) cam duc ((ban thanh) or (ban hanh)) hai cuu tre*.