Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
hieu viec » nhieu viec, sieu viet, hieu hien
sach nuoc » sach duoc, cac nuoc, bach tuoc
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
doi cua » dai cua, hoi cua
nang xa » nang x, lang xa, nang ma
vu sac » vu sach, vu san, vu cac
va sac » va cac, va suc, va san

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