Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
ban hang » ngan hang
vu triet » su triet, ve triet, tu triet
hang lap » sang lap, hang la, hang tap
vien cac » vien bach, vien dai, vien da
sach ty » sach y, sach tu, sach thu
xuc ban » duc ban, cuc ban, quoc ban
ty nang » ky nang, ty xang, ty hang
tu sach » thu sach, su sach, te sach
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho

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: tu sach ty nang x hoi. hieu ((ve cam) OR (vien cac)) xuc ban hang lap ((vu triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu ((ve cam) or (vien cac)) xuc ban hang lap ((vu triet) OR (va triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((ve cam) or (vien cac)) xuc ban hang lap ((vu triet) OR (va triet))*.