Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh tai » thanh tai, hang tai, han tai
truc va » thuc va, thuc vat, trung va
mang xa » lang xa, mang may, dang xay
tai cua » thai cua, tai cuc, tri cua
hieu va » lieu va, hieu qua
loc va » hoc va, luc va
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((mang xa) or (nang x)) hoi. hieu va cam ((truc va) or (loc va)) hanh tai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((mang xa) OR (nang x)) hoi. hieu va cam ((truc va) OR (loc va)) hanh tai cua viet.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((mang xa) or (nang x)) hoi. hieu va cam ((truc va) or (loc va)) hanh tai cua viet*.