Perhaps you should try some spelling variations:
cach van » cac van, bach van, canh van
cam thuc » am thuc, nam thuc, cam thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
sach va » sach xa, sach ha, sach dao
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((cach van) or (sach va)) nang xa hoi. hieu va cam thuc van hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((cach van) OR (sach va)) nang xa hoi. hieu va cam thuc van hanh vi su triet.
• Adding a wildcard symbol may retrieve word variants: su ((cach van) or (sach va)) nang xa hoi. hieu va cam thuc van hanh vi su triet*.