Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
sach nuoc » sach duoc, cac nuoc, bach tuoc
hieu van » hieu va, thien van, lieu va
danh doi » danh di, thanh doi, dung doi
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
va danh » va dinh, va dan, va hanh
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi

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

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