Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu
nuoc » quoc, duoc, ngoc

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 ky nang xa hoi. ((hieu viec) or (hieu ve)) hoc nuoc va danh di ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. ((hieu viec) OR (hieu ve)) hoc nuoc va danh di ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. ((hieu viec) or (hieu ve)) hoc nuoc va danh di ((cua tre) or (cua te))*.