Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
ban thanh » ban hanh, ban hang
cua viet » hoa viet, cua vat, cua dieu
tu sach » thu sach, te sach, tu cach
chi cuc » thi cuc
cuc ban » cua ban, cac ban, cuu ban
ca viet » va viet, co viet, hoa viet
hieu ve » hieu va, hieu van
nang ho » nang hoc, nang co, tang ho
su sach » so sach, vu sach
ho hoi » hoc hoi, hoa hoi, hoi hoi
ve chi » ve chim, ke chi, va chi

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) or (su sach)) ky nang ho hoi. hieu ve chi cuc ban thanh vien ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ho hoi. hieu ve chi cuc ban thanh vien ((cua viet) OR (ca viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang ho hoi. hieu ve chi cuc ban thanh vien ((cua viet) OR (ca viet))*".