Perhaps you should try some spelling variations:
thanh doanh » hanh doanh, thanh toan, chinh doanh
doanh cua » doanh luan
hieu vien » hieu hien, hieu viec, thieu nien
va thanh » gia thanh, ban thanh, va tinh
vien cac » vien bach, vien dai, vien da
cac tuc » cac toc, cac tu, cac tac
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
sach v » sach va, sach y, sach vay
tuc va » thuc va, truc va, tuc xa
sach 2 » sach y
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach v) or (sach 2)) ((nang xa) OR (lang xa)) hoi. hieu vien cac tuc va thanh doanh cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) ((nang xa) OR (lang xa)) hoi. hieu vien cac tuc va thanh doanh cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach v) or (sach 2)) ((nang xa) OR (lang xa)) hoi. hieu vien cac tuc va thanh doanh cua tu*".