Perhaps you should try some spelling variations:
thien van » thi van
doanh dan » doanh ban, doanh van, doanh dao
lam thuoc » nam thuoc, am thuc, cay thuoc
thuoc va » thuc va, thuoc ma, thuong va
va doanh » van doanh, vay doanh, va danh
va viet » hoa viet, san viet, mai viet
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
dan va » doan va, dan ca, ban va
te sai » te tai, te bai, te lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ((ky lang) OR (ky dang)) xa hoi. ((thien van) or (hieu va)) lam thuoc va doanh dan va viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ((ky lang) OR (ky dang)) xa hoi. ((thien van) OR (hieu va)) lam thuoc va doanh dan va viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ((ky lang) OR (ky dang)) xa hoi. ((thien van) or (hieu va)) lam thuoc va doanh dan va viet".
• Adding a wildcard symbol may retrieve word variants: te sai ((ky lang) OR (ky dang)) xa hoi. ((thien van) or (hieu va)) lam thuoc va doanh dan va viet*.