Perhaps you should try some spelling variations:
ban hanh » ban hang
cham luc » nhan luc, cham cuu, chat lua
hai chu » hai chau, hoi chu, hai chi
hoi cau » hoi chu, hoc cau, hoa cau
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. hieu ve ((cham luc) OR (cham soc)) ban hanh ((hoi cau) or (hai chu)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu ve ((cham luc) OR (cham soc)) ban hanh ((hoi cau) OR (hai chu)) treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. hieu ve ((cham luc) OR (cham soc)) ban hanh ((hoi cau) or (hai chu)) treo".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu ve ((cham luc) OR (cham soc)) ban hanh ((hoi cau) or (hai chu)) treo*.