Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
sach nuoc » sach duoc, cac nuoc, bach tuoc
duong doi » duong loi, dung doi, huong doi
va duong » van duong, va tuong, va huong
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
doi cuu » doi cua, doi cuoc
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
su sac » su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su sach)) ky nang xa hoi. ((nhieu viec) or (hieu van)) sach nuoc va duong doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky nang xa hoi. ((nhieu viec) OR (hieu van)) sach nuoc va duong doi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su sach)) ky nang xa hoi. ((nhieu viec) or (hieu van)) sach nuoc va duong doi cuu tre*.