Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
thanh vi » thanh va, thanh ve, nhanh vi
ky sang » ky nang, ky dang, duy sang
ky tang » ky nang, ky dang, kho tang
va tham » van tham, va cham, va thanh
thuc va » thuc vat, thuc dan, thuc day

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ky sang) OR (ky tang)) ma hoa. lieu va tham thuc va ((thanh vi) or (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky sang) OR (ky tang)) ma hoa. lieu va tham thuc va ((thanh vi) OR (hanh vi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky sang) OR (ky tang)) ma hoa. lieu va tham thuc va ((thanh vi) or (hanh vi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky sang) OR (ky tang)) ma hoa. lieu va tham thuc va ((thanh vi) or (hanh vi)) cua triet*.