Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
danh vai » danh sai, danh va, dang van
tang xa » trang xa, tang ma, lang xa
van cam » van nam, van lam, van cau
sach ty » sach y, sach tu, sach thu
ty tang » tay tang, ty xang, ty hang
cuu tre » cua tre, cau treo
tu sach » thu sach, su sach, te sach
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 cam xuc va ((danh vai) or (doanh van)) ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty tang xa hoi. hieu van cam xuc va ((danh vai) OR (doanh van)) ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty tang xa hoi. hieu van cam xuc va ((danh vai) or (doanh van)) ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty tang xa hoi. hieu van cam xuc va ((danh vai) or (doanh van)) ((cuu tre) OR (cau tren))*.