Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
danh vai » danh sai, danh va, dang van
cau tren » cu tren, dau tren, ca tren
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
y lang » o lang, _ lang, tay lang
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: toc sach y lang xa hoi. hieu van cam xuc va ((danh vai) or (doanh van)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y lang xa hoi. hieu van cam xuc va ((danh vai) OR (doanh van)) cau tren.
• Adding a wildcard symbol may retrieve word variants: toc sach y lang xa hoi. hieu van cam xuc va ((danh vai) or (doanh van)) cau tren*.