Perhaps you should try some spelling variations:
sach nuoc » sach duoc, cac nuoc, bach tuoc
hieu viec » nhieu viec, sieu viet, hieu hien
danh dai » danh dau, danh di, danh sai
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ky) or (sac ky)) nang x hoi. ((hieu viec) or (hieu ve)) sach nuoc va danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sac ky)) nang x hoi. ((hieu viec) OR (hieu ve)) sach nuoc va danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) or (sac ky)) nang x hoi. ((hieu viec) or (hieu ve)) sach nuoc va danh dai cua tre*.