Perhaps you should try some spelling variations:
ban hang » ngan hang
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
thi van » thi lan, thi hanh, thi nang
van cam » van nam, van lam, van cau
va danh » va dinh, va dan, va hanh
cam tu » cam thu, nam tu, dam tu
ki su » ky su

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 ky nang x ho. thi van cam tu ((ban hang) or (va danh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x ho. thi van cam tu ((ban hang) OR (va danh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x ho. thi van cam tu ((ban hang) or (va danh)) ki su triet*.