Perhaps you should try some spelling variations:
luat duoc » luat tuc
doanh van » doan van, doanh va, doanh ban
lam duoc » nam duoc, lam thuoc, tao duoc
va doanh » van doanh, vay doanh, va danh
hieu van » hieu va, thien van, lieu va
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((nang xa) or (nang x)) hoi. hieu van ((lam duoc) OR (luat duoc)) va doanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (nang x)) hoi. hieu van ((lam duoc) OR (luat duoc)) va doanh van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang xa) or (nang x)) hoi. hieu van ((lam duoc) OR (luat duoc)) va doanh van cua tre*".