Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
trang va » tran van, hang va
trung va » truong va, trung ha, trung tam
so sanh » do sanh
truc va » thuc va, thuc vat
hieu va » lieu va, hieu qua
sanh y » sinh y, anh y, hanh y
va cam » va cham, va cac, va cao
nang o » nang co, nang ho, nang ro
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
o hoi » co hoi, o hoc, o hai

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 y nang o hoi. hieu va cam ((truc va) or (((trung va) or (trang va)))) hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y nang o hoi. hieu va cam ((truc va) OR (((trung va) OR (trang va)))) hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: so sanh y nang o hoi. hieu va cam ((truc va) or (((trung va) or (trang va)))) hanh vi cua viet*.