Perhaps you should try some spelling variations:
doanh tien » doanh tren, doanh vien, doanh chien
sach vaya » sach va, sach hay, sach nay
va thuat » ky thuat, ki thuat, va thuc
tien cuc » dien cuc, tien cua, tien duc
va doanh » van doanh, vay doanh, va danh
sach vay » sach va, sach hay, sach nay
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
soc va » hoc va, loc va, doc va
cuc te » cua te, cuc thue, cuc tieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach vay) or (sach vaya)) nang xa hoi. hieu ((va cham) or (va thuat)) soc va doanh tien cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach vay) OR (sach vaya)) nang xa hoi. hieu ((va cham) OR (va thuat)) soc va doanh tien cuc te.
• Adding a wildcard symbol may retrieve word variants: te ((sach vay) or (sach vaya)) nang xa hoi. hieu ((va cham) or (va thuat)) soc va doanh tien cuc te*.