Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
banh chi » danh cho, dinh chi, bao chi
vanh dai » van dai, vanh tai, lanh dao
hieu van » hieu va, thien van, lieu va
xuc ban » duc ban, cuc ban, quoc ban
van cam » van nam, van lam, van cau
nang xa » lang xa, nang ma, mang xa
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (nang x)) hoi. hieu van cam xuc ban ((vanh dai) or (banh chi)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (nang x)) hoi. hieu van cam xuc ban ((vanh dai) OR (banh chi)) cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (nang x)) hoi. hieu van cam xuc ban ((vanh dai) or (banh chi)) cua viet*.