Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hang » ngan hang
cay dua » chay dua, cay lua, ca dua
hai cua » thai cua, dai cua, hoi cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cam dua » ca dua, chay dua, cach dua
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma

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 nang xa hoi. hieu ve ((cam dua) or (cay dua)) ((ban hanh) or (ban hang)) hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ve ((cam dua) OR (cay dua)) ((ban hanh) OR (ban hang)) hai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ve ((cam dua) or (cay dua)) ((ban hanh) or (ban hang)) hai cua triet*.