Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
ve triet » va trien, su triet
toc sac » toc sach, toc san, hoc sach
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
va nam » van nam, ha nam, va nay
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky sang ma hoi. hieu va nam thuc va hanh vi ((cua te) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky sang ma hoi. hieu va nam thuc va hanh vi ((cua te) OR (ve triet))*.