Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
van doanh » toan doanh, van dong, van thanh
doc sach » hoc sach, toc sach, dac sac
tai cua » thai cua, tai cuc, tri cua
xuc van » duc van, luc van, vuc van
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
ha hoi » hoa hoi, ha noi, xa hoi
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
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: ((doc sach) OR (nuoc sach)) ky dang ha hoi. hieu ((va cam) or (va cao)) xuc van doanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (nuoc sach)) ky dang ha hoi. hieu ((va cam) OR (va cao)) xuc van doanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) OR (nuoc sach)) ky dang ha hoi. hieu ((va cam) or (va cao)) xuc van doanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) OR (nuoc sach)) ky dang ha hoi. hieu ((va cam) or (va cao)) xuc van doanh tai cua te*.