Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
chat cuc » chat cua, chat xuc, chi cuc
dien cua » dieu cua, dien cuc, dien cu
vien cua » viec cua, tien cua, bien cua
cuc ban » cua ban, cac ban, cuu ban
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
hoc hoi » hoc khoi, hoc hoa, hoc noi
ve chat » va chat, van chat
ho hoi » hoa hoi, hoi hoi, co hoi

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 ky nang ((ho hoi) or (hoc hoi)). hieu ve chat cuc ban thanh ((vien cua) OR (dien cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ho hoi) OR (hoc hoi)). hieu ve chat cuc ban thanh ((vien cua) OR (dien cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ho hoi) or (hoc hoi)). hieu ve chat cuc ban thanh ((vien cua) OR (dien cua)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ho hoi) or (hoc hoi)). hieu ve chat cuc ban thanh ((vien cua) OR (dien cua)) viet*.