Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
hieu van » thien van, lieu va, hieu ve
danh vai » danh sai, danh va, dang van
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ty tang » tay tang, ty xang, ty hang
xuc va » duc va, tuc va, luc 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 ty tang xa hoi. ((hieu van) or (hieu va)) cam xuc va ((danh vai) or (doanh van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty tang xa hoi. ((hieu van) OR (hieu va)) cam xuc va ((danh vai) OR (doanh van)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty tang xa hoi. ((hieu van) or (hieu va)) cam xuc va ((danh vai) or (doanh van)) cuu tre*.