Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
sach nuoc » sach duoc, cac nuoc, bach tuoc
va thanh » gia thanh, ban thanh, va tinh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
doi cua » hoi cua
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky

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

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