Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
van nang » van quang, van ban, van dong
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
so sanh » do sanh
ve cham » va cham, ve chat, vu cham
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, tuc xa, duc va
v nang » va nang, vu nang, voi 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 ((v nang) or (van nang)) ma hoi. hieu ve cham ((tuc va) or (truc va)) hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ((v nang) OR (van nang)) ma hoi. hieu ve cham ((tuc va) OR (truc va)) hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: so sanh ((v nang) or (van nang)) ma hoi. hieu ve cham ((tuc va) or (truc va)) hanh vi cua viet*.