Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hieu » cao hieu
hieu duc » hieu luc, hieu dac, hieu tuc
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
va tinh » may tinh
doi cuu » doi cua, doi cuoc
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang xa hoi. hieu van hieu duc ((va hanh) or (va tinh)) doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang xa hoi. hieu van hieu duc ((va hanh) OR (va tinh)) doi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang xa hoi. hieu van hieu duc ((va hanh) or (va tinh)) doi cuu tre*.