Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
sach cam » sach cap, sach tham, sach dao
mach cam » mach cao, manh cam, mac ca
cam thuc » am thuc, nam thuc, cam thu
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach cam) OR (mach cam)) nang ma hoi. hieu ve cam thuc va hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach cam) OR (mach cam)) nang ma hoi. hieu ve cam thuc va hanh vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach cam) OR (mach cam)) nang ma hoi. hieu ve cam thuc va hanh vi ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach cam) OR (mach cam)) nang ma hoi. hieu ve cam thuc va hanh vi ((cua triet) or (su triet))*.