Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hang » ngan hang
sach ly » sach y, sach lo, sach ty
vu sach » vu bach, su sach, vu khach
cong ha » cong hoa, dong ha, cong tac
nang xa » nang x, lang xa, nang ma
ca tuc » cua tuc, va tuc
vi cua » vai cua, di cua
qua ca » qua cac, qua cua, qua cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ly ((nang xa) or (cong ha)) hoi. hieu qua ca tuc ((ban hanh) or (ban hang)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly ((nang xa) OR (cong ha)) hoi. hieu qua ca tuc ((ban hanh) OR (ban hang)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ly ((nang xa) or (cong ha)) hoi. hieu qua ca tuc ((ban hanh) or (ban hang)) vi cua triet*.