Perhaps you should try some spelling variations:
trinh viet » ninh viet, trinh vat
nhien viet » nhin viet, nghiep viet, trien viet
viet cac » vien cac, viet ca, viet bac
va trinh » van trinh, va tinh, lap trinh
cac xuc » cam xuc, cac nuoc, chat xuc
nang ma » tang ma, sang ma, nang cao
cua tu » cua tuc, cua su, cua te
tu sai » tu bai, tu san, tu cai
xuc va » duc va, tuc va, luc va
sai ky » sac ky
cua cu » cua chu, cua cau, cua su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang x) OR (nang ma)) hoi. nhien viet cac xuc va trinh viet ((cua tu) OR (cua cu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((nang x) or (nang ma)) hoi. nhien viet cac xuc va trinh viet ((cua tu) OR (cua cu))~".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang x) or (nang ma)) hoi. nhien viet cac xuc va trinh viet ((cua tu) OR (cua cu))*.