Perhaps you should try some spelling variations:
ve triet » va trien, su triet
ban hang » ngan hang
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, va cam, ve cai
kem ve » ke ve
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang x hoi. hieu ((ve cam) or (ve cac)) xuc ((ban hanh) OR (ban hang)) kem ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((ve cam) OR (ve cac)) xuc ((ban hanh) OR (ban hang)) kem ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu ((ve cam) or (ve cac)) xuc ((ban hanh) OR (ban hang)) kem ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((ve cam) or (ve cac)) xuc ((ban hanh) OR (ban hang)) kem ve triet*.