Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
cua triet » cua viet, su triet, va triet
nam thuc » am thuc, nam thu, nam tu
tinh doi » trinh doc, trinh do, tinh hoc
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va tinh » may tinh
doi cua » dai cua, hoi cua
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 lang xa hoi. ((lieu va) or (hieu qua)) ((nam thuc) OR (nam thuoc)) va tinh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. ((lieu va) OR (hieu qua)) ((nam thuc) OR (nam thuoc)) va tinh doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. ((lieu va) or (hieu qua)) ((nam thuc) OR (nam thuoc)) va tinh doi cua triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. ((lieu va) or (hieu qua)) ((nam thuc) OR (nam thuoc)) va tinh doi cua triet*.