Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban hang » ngan hang
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va danh » va dinh, va dan, va hanh
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho
thiet » thieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu ve cac tuc ((ban hang) OR (va danh)) vi ((su triet) OR (va thiet))~.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu ve cac tuc ((ban hang) or (va danh)) vi ((su triet) or (va thiet))*.