Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
ban hang » ngan hang
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, dam thuc

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 ky) or (sach y)) nang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) ban hang va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) ban hang va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach y)) nang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) ban hang va su triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) nang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) ban hang va su triet*.