Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
hau treo » cau treo, cau theo, dau tren
thu nang » thu hang, thu bang, tho nang
thi nang » thi cong, ki nang, thi hanh
va doanh » van doanh, vay doanh, va danh
van hau » van ha, van hai, van dau
tu sach » thu sach, su sach, te sach
ve pham » vi pham, ve phan, ve phat
v pham » vi pham, d pham
duy va » duy vat, duy van, day va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((thu nang) or (thi nang)) xa hoi. hieu ((ve pham) OR (v pham)) duy va doanh van hau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu nang) OR (thi nang)) xa hoi. hieu ((ve pham) OR (v pham)) duy va doanh van hau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thu nang) or (thi nang)) xa hoi. hieu ((ve pham) OR (v pham)) duy va doanh van hau treo".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu nang) or (thi nang)) xa hoi. hieu ((ve pham) OR (v pham)) duy va doanh van hau treo*.