Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
sach nuoc » sach duoc, cac nuoc, bach tuoc
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
dan doi » dan hoi, dan toi, van doi
cua tre » cuu tre, cua triet, dua tren
va dan » ca dan, va dao, va dau
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ky nang xa hoi. ((hieu viec) or (hieu ve)) sach nuoc va dan doi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang xa hoi. ((hieu viec) OR (hieu ve)) sach nuoc va dan doi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky nang xa hoi. ((hieu viec) or (hieu ve)) sach nuoc va dan doi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang xa hoi. ((hieu viec) or (hieu ve)) sach nuoc va dan doi ((cua tre) OR (cua te))*.