Perhaps you should try some spelling variations:
hau treo » cau treo, cau theo, dau tren
va doanh » van doanh, vay doanh, hoa doanh
thu nang » thi nang, thu bang, tho nang
thu hang » thi hang, thuc hanh, thu huong
pham day » phap day, pham duy, pham xay
van hau » van ha, van hai, van dau
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan

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 (thu hang)) xa hoi. hieu ve pham day ((va doanh) or (va danh)) van hau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu nang) OR (thu hang)) xa hoi. hieu ve pham day ((va doanh) OR (va danh)) van hau treo.
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu nang) or (thu hang)) xa hoi. hieu ve pham day ((va doanh) or (va danh)) van hau treo*.