Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
thien van » thi van
thuoc va » thuoc ma, thuong va, thuoc tai
cua viet » ca viet, hoa viet, cua vat
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
nang xa » nang x, lang xa, nang ma
dan cua » dan ca, ban cua, dai cua
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 hoi. ((thien van) or (hieu va)) lam ((thuoc va) OR (thuc va)) doanh dan cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. ((thien van) OR (hieu va)) lam ((thuoc va) OR (thuc va)) doanh dan cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. ((thien van) or (hieu va)) lam ((thuoc va) OR (thuc va)) doanh dan cua viet".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. ((thien van) or (hieu va)) lam ((thuoc va) OR (thuc va)) doanh dan cua viet*.