Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, tu cach
hieu ve » hieu va, hieu van
dan cua » dan ca, ban cua, dai cua
te sach » toc sach
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
xuc va » duc va, tuc va, luc va
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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) OR (te sach)) y ((nang ma) or (tang ma)) hoi. hieu ve cam xuc va doanh dan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y ((nang ma) OR (tang ma)) hoi. hieu ve cam xuc va doanh dan cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) y ((nang ma) or (tang ma)) hoi. hieu ve cam xuc va doanh dan cua te*".