Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
doanh van » doan van, doanh va, doanh ban
hieu van » thien van, lieu va, hieu ve
thuoc va » thuc va, thuoc ma, thuong va
va doanh » van doanh, vay doanh, va danh
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
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 lang) or (ky nang)) xa hoi. ((hieu van) OR (hieu va)) lam thuoc va doanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky lang) OR (ky nang)) xa hoi. ((hieu van) OR (hieu va)) lam thuoc va doanh van cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky lang) or (ky nang)) xa hoi. ((hieu van) OR (hieu va)) lam thuoc va doanh van cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky lang) or (ky nang)) xa hoi. ((hieu van) OR (hieu va)) lam thuoc va doanh van cua tre*.