Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam 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
nang xa » nang x, lang xa, nang ma
hanh ve » hanh vi, hanh va
sai ky » sac ky
va nam » van nam, ha nam, va nay
ve su » va 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 ((((sach kem) or (hanh kem))) or (sai ky)) nang xa hoi. lieu va nam thuc van hanh ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sach kem) OR (hanh kem))) OR (sai ky)) nang xa hoi. lieu va nam thuc van hanh ve su triet.
• Adding a wildcard symbol may retrieve word variants: su ((((sach kem) or (hanh kem))) or (sai ky)) nang xa hoi. lieu va nam thuc van hanh ve su triet*.