Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
cua triet » cua viet, su triet, va triet
cam thuc » am thuc, nam thuc, cam thu
thuc day » thuc dan, thuc vat
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
thiet » thieu

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 y nang xa hoi. hieu ve cam thuc day thanh vi ((cua triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ve cam thuc day thanh vi ((cua triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ve cam thuc day thanh vi ((cua triet) or (va thiet))*.