Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
doanh van » doan van, doanh va, doanh ban
sach thu » sach thue, sach thieu, sach tham
thu xang » thu hang, thu bang, thu dang
danh vai » danh sai, danh va, dang van
viec da » viec dat, vien da, viec va
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
co viet » so viet, o viet, hoc viet
xuc va » duc va, tuc va, luc va
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thu xang ((ma hoi) or (mai hoi)). hieu viec da xuc va ((danh vai) OR (doanh van)) co viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu xang ((ma hoi) OR (mai hoi)). hieu viec da xuc va ((danh vai) OR (doanh van)) co viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu xang ((ma hoi) or (mai hoi)). hieu viec da xuc va ((danh vai) OR (doanh van)) co viet".
• Adding a wildcard symbol may retrieve word variants: te sach thu xang ((ma hoi) or (mai hoi)). hieu viec da xuc va ((danh vai) OR (doanh van)) co viet*.