Perhaps you should try some spelling variations:
hanh kien » danh kien, anh kien, thanh vien
su triet » su viet, su tien, ve triet
ban hanh » ban hang
va cham » va chat, va tham
kien su » nien su, tien su, vien sau
xuc ban » duc ban, cuc ban, quoc ban
tu sach » thu sach, su sach, te sach
tai hoi » tai khoi, dai hoi, tai hai
va nang » van nang, da nang, cam nang
vu nang » vuc nang, vu dang, v nang
va cam » va cac, va cao, va cai

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 ((vu nang) or (va nang)) tai hoi. hieu ((va cam) OR (va cham)) xuc ban hanh kien su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((vu nang) OR (va nang)) tai hoi. hieu ((va cam) OR (va cham)) xuc ban hanh kien su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((vu nang) or (va nang)) tai hoi. hieu ((va cam) OR (va cham)) xuc ban hanh kien su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((vu nang) or (va nang)) tai hoi. hieu ((va cam) OR (va cham)) xuc ban hanh kien su triet*.