Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua viet » ca viet, hoa viet, cua vat
thanh vi » hanh vi, thanh va, thanh ve
truc ban » thuc ban, truc dan, truc van
ve cham » va cham, ve chat, vu cham
cao hoi » cau hoi, co hoi, cao hoc
ve cam » ve cac, va cam, ve cai
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) OR (do sanh)) y nang cao hoi. hieu ((ve cam) or (ve cham)) truc ban thanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (do sanh)) y nang cao hoi. hieu ((ve cam) OR (ve cham)) truc ban thanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) OR (do sanh)) y nang cao hoi. hieu ((ve cam) or (ve cham)) truc ban thanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: ((so sanh) OR (do sanh)) y nang cao hoi. hieu ((ve cam) or (ve cham)) truc ban thanh vi cua viet*.