Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
doan van » doan va, hoang van, luan van
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
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 ky tang xa hoi. hieu ve cam xuc va ((danh vai) or (doan van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. hieu ve cam xuc va ((danh vai) OR (doan van)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. hieu ve cam xuc va ((danh vai) or (doan van)) cuu tre*.