Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
luc van » luoc van, luu van, duc van
ky tang » ky nang, ky dang, kho tang
hanh de » hanh ve, hanh kem
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
va hoi » xa hoi, va hoc, va hoa
va cau » van cau, va cac, va dau

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 tang ((va hoi) or (ha noi)). hieu va cau luc van ((hanh de) or (hanh vi)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ((va hoi) OR (ha noi)). hieu va cau luc van ((hanh de) OR (hanh vi)) cua viet.
• Adding a wildcard symbol may retrieve word variants: te sac ky tang ((va hoi) or (ha noi)). hieu va cau luc van ((hanh de) or (hanh vi)) cua viet*.