Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
sach duoc » sach nuoc, sach dao, sach dung
thanh doi » thanh loi, thanh moi, thanh do
cua triet » cua viet, su triet, va triet
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
doi cua » dai cua, hoi cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. hieu viec ((sach duoc) or (cac nuoc)) va thanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu viec ((sach duoc) OR (cac nuoc)) va thanh doi cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu viec ((sach duoc) or (cac nuoc)) va thanh doi cua triet*.