Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nang cau » nang cao, hang cau, nang dau
va thanh » gia thanh, ban thanh, le thanh
cam truc » cau truc, nam truc, lam truoc
hieu ve » hieu va, hieu van
va tinh » may tinh
v nang » va nang, vu nang, van nang
ve cam » ve cham, ve cac, va cam
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)) v nang cau hoi. hieu ve cam truc ((va thanh) OR (va tinh)) vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (do sanh)) v nang cau hoi. hieu ve cam truc ((va thanh) OR (va tinh)) vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) or (do sanh)) v nang cau hoi. hieu ve cam truc ((va thanh) OR (va tinh)) vi cua viet".
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (do sanh)) v nang cau hoi. hieu ve cam truc ((va thanh) OR (va tinh)) vi cua viet*.