Perhaps you should try some spelling variations:
doanh co » doanh cua, doanh va, anh co
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ve cac » va cac, vien cac
luc va » tuc va, loc va
co cua » con cua, ca cua, cong cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((nang xa) or (lang xa)) hoi. hieu ve cac ((luc va) or (duc va)) doanh co cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang xa) OR (lang xa)) hoi. hieu ve cac ((luc va) OR (duc va)) doanh co cua tuc.
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang xa) or (lang xa)) hoi. hieu ve cac ((luc va) or (duc va)) doanh co cua tuc*.