Perhaps you should try some spelling variations:
ban hang » ngan hang
hang vai » hang va, hang tai, hang hai
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam cuc » cham cuu, pham cuc
vai va » mai va, dai va, hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (cac ky)) nang xa hoi. hieu va ((cam cuc) OR (cam xuc)) ban hang vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (cac ky)) nang xa hoi. hieu va ((cam cuc) OR (cam xuc)) ban hang vai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (cac ky)) nang xa hoi. hieu va ((cam cuc) OR (cam xuc)) ban hang vai va triet*".