Perhaps you should try some spelling variations:
sach nuoc » sach duoc, cac nuoc, bach tuoc
hieu viec » nhieu viec, hieu ve, sieu viet
thien van » thi van
danh doi » danh di, thanh doi, dung doi
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
doi cua » dai cua, hoi cua
va danh » va dinh, va dan, va hanh
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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

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