Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
truc ban » thuc ban, truc dan, truc van
thanh vi » hanh vi, thanh va, thanh ve
cua viet » ca viet, hoa viet, cua vat
so sinh » so sanh, so tinh, cho sinh
cao hoi » cau hoi, co hoi, cao hoc
sinh v » sinh va, sinh y, sinh vat
v nang » va nang, vu nang, van nang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
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 sinh v nang cao hoi. hieu ((ve cam) or (ve cac)) truc ban thanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sinh v nang cao hoi. hieu ((ve cam) OR (ve cac)) truc ban thanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: so sinh v nang cao hoi. hieu ((ve cam) or (ve cac)) truc ban thanh vi cua viet*.