Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
sach nuoc » sach duoc, cac nuoc, bach tuoc
hieu van » thien van, lieu va, hieu ve
dinh doi » dinh moi, tinh doi, dinh toi
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va dinh » van dinh, va kinh, va tinh
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
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 va) or (hieu van)))) sach nuoc va dinh doi 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 va) OR (hieu van)))) sach nuoc va dinh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang xa hoi. ((hieu viec) or (((hieu va) or (hieu van)))) sach nuoc va dinh doi cua tre*.