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

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 (sac ky)) nang xa hoi. hieu va cam cuc ((ban thanh) OR (ban hanh)) vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu va cam cuc ((ban thanh) OR (ban hanh)) vai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang xa hoi. hieu va cam cuc ((ban thanh) OR (ban hanh)) vai va triet*".