Perhaps you should try some spelling variations:
may trinh » may tinh, lap trinh, quy trinh
cua viet » hoa viet, cua vat, cua dieu
trinh vi » trinh va, trinh ve, trinh viet
ca viet » va viet, co viet, hoa viet
loc may » hoc may, loc mau, loai may
cac loc » cac lop, cac toc, cac hoc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ve cac » va cac, vien cac
sac ky » sai ky

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: so ((sac ky) OR (cac ky)) lang xa hoi. hieu ve cac loc may trinh vi ((cua viet) OR (ca viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sac ky) OR (cac ky)) lang xa hoi. hieu ve cac loc may trinh vi ((cua viet) or (ca viet))~".
• Adding a wildcard symbol may retrieve word variants: so ((sac ky) OR (cac ky)) lang xa hoi. hieu ve cac loc may trinh vi ((cua viet) or (ca viet))*.