Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
cua triet » cua viet, su triet, va triet
phan lai » phan loai, phan lap, phan lan
van phan » van phong, van thanh, luan phan
thuc van » thuc vat, thuc dan, thuc va
nang hoc » nang doc, nang luc, dong hoc
lai cua » dai cua, hai cua, lai chau
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
tu sach » thu sach, te sach, tu cach
nang ho » nang co, tang ho, nang cao
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) y ((nang ho) OR (nang hoc)) hoi. hieu vu cham thuc van phan lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y ((nang ho) OR (nang hoc)) hoi. hieu vu cham thuc van phan lai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) y ((nang ho) OR (nang hoc)) hoi. hieu vu cham thuc van phan lai cua triet*".