Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
lam thuc » lam thuoc, am thuc, nam thuc
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang xa hoi. ((hieu ve) or (hieu va)) lam thuc ((van hanh) or (ban hanh)) va va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. ((hieu ve) OR (hieu va)) lam thuc ((van hanh) OR (ban hanh)) va va trien.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. ((hieu ve) or (hieu va)) lam thuc ((van hanh) or (ban hanh)) va va trien*.