Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cay thuoc » cua thuoc, nam thuoc, va thuoc
doanh dan » doanh ban, doanh van, doanh dao
hieu van » thien van, lieu va, hieu ve
va doanh » van doanh, vay doanh, va danh
thuoc va » thuc va, thuoc ma, thuong va
nang xa » nang x, nang ma, mang xa
dan cua » dan ca, ban cua, dai cua
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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 (lang xa)) hoi. ((hieu van) or (hieu va)) cay thuoc va doanh dan cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (lang xa)) hoi. ((hieu van) OR (hieu va)) cay thuoc va doanh dan cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang xa) OR (lang xa)) hoi. ((hieu van) or (hieu va)) cay thuoc va doanh dan cua triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) OR (lang xa)) hoi. ((hieu van) or (hieu va)) cay thuoc va doanh dan cua triet*.