Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam thuc » am thuc, nam thuc, cam thu
vat hanh » vat thanh, van hanh, va hanh
so sach » so sanh, bo sach, co sach
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ly ((nang cao) or (nang x)) hoi. hieu ve cam thuc vat hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ly ((nang cao) OR (nang x)) hoi. hieu ve cam thuc vat hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach ly ((nang cao) or (nang x)) hoi. hieu ve cam thuc vat hanh vi cua triet*.