Perhaps you should try some spelling variations:
hieu cac » hieu luc, hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
qua van » quan van, qua ban, qua san
hieu xa » hiem xa, hieu va, hieu ca
sac ky » cac ky, sai ky
qua va » quan va, vua va, qua ca
vi cuu » vi luu, vinh cuu
tu sac » tu sach, tu cac, tu san
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. ((hieu xa) or (hieu cac)) nam ((qua va) or (qua van)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. ((hieu xa) OR (hieu cac)) nam ((qua va) OR (qua van)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. ((hieu xa) or (hieu cac)) nam ((qua va) or (qua van)) hanh vi cuu tre*.