Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu hien, hieu tiem
sieu viet » su viet, dien viet, bien viet
sach nuoc » sach duoc, cac nuoc, bach tuoc
danh doi » danh di, thanh doi, dung doi
su sach » so sach, vu sach
doi cua » dai cua, hoi cua
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma

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

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