Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
van thanh » ban thanh, van tuan
hieu hien » bieu hien, dieu hien, chieu chien
thu sach » tu sach, thuat sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach tu, sach thu
lang ha » long ha
ty lang » tay lang, ty xang, ty hang
ha hoi » hoa hoi, ha noi, xa hoi
cac tu » cac thu, cach tu, cac du
tu van » tu va
vi cau » va cau, ve cau, di cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty lang ha hoi. ((hieu viec) OR (hieu hien)) cac tu van thanh vi cau tren~.
• Adding a wildcard symbol may retrieve word variants: thu sach ty lang ha hoi. ((hieu viec) or (hieu hien)) cac tu van thanh vi cau tren*.