Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec bach » vien bach, viec ban, viec bao
bach tuoc » sach duoc, sach nuoc
ty chang » ty hang, ty chung, thi chang
chang xu » chang xue, chao xu, thong xu
danh du » danh dau, danh tu, dinh du
va danh » va dinh, va dan, va hanh
tuoc va » thuoc va, nuoc va, duoc va
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
xu hoi » xa hoi, lu hoi, vu hoi
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (so sanh)) ty chang xu hoi. hieu viec bach tuoc va danh du ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty chang xu hoi. hieu viec bach tuoc va danh du ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ty chang xu hoi. hieu viec bach tuoc va danh du ((cua te) or (cua tu))*.