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