Perhaps you should try some spelling variations:
danh kien » dinh kien, danh viet, linh kien
pham thuc » phap thuc, pham chuc, nham thuc
doc sach » hoc sach, toc sach, nuoc sach
thuc day » thuc dan, thuc vat
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va pham » van pham, va phat, va phap
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ky nang xa hoi. lieu va pham thuc day ((danh kien) or (anh viet)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky nang xa hoi. lieu va pham thuc day ((danh kien) OR (anh viet)) cua tre.
• Adding a wildcard symbol may retrieve word variants: doc sach ky nang xa hoi. lieu va pham thuc day ((danh kien) or (anh viet)) cua tre*.