Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
su viet » so viet
va hanh » van hanh, va thanh, va danh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
su tien » su kien, su hien, tu tieng
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
va han » va phan, van han, va hang
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang xa hoi. hieu ve nam thuc ((va han) or (va hanh)) tai ((su tien) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. hieu ve nam thuc ((va han) OR (va hanh)) tai ((su tien) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ve nam thuc ((va han) or (va hanh)) tai ((su tien) or (su viet))*.