Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
so sanh » do sanh
ve cham » va cham, ve chat, vu cham
truc va » thuc va, thuc vat, trung va
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
ve cam » ve cac, va cam, ve cai
vi hoa » voi hoa, vi hoc, va hoa

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 _ nang cau hoi. hieu ((ve cam) or (ve cham)) truc va tinh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh _ nang cau hoi. hieu ((ve cam) OR (ve cham)) truc va tinh vi hoa viet.
• Adding a wildcard symbol may retrieve word variants: so sanh _ nang cau hoi. hieu ((ve cam) or (ve cham)) truc va tinh vi hoa viet*.