Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
va trinh » van trinh, va tinh, lap trinh
viet cac » vien cac, viet bac, viet cau
viet ca » viet ha, viet co, viet a
nang ma » tang ma, sang ma, nang cao
tu san » thu san, tu ban, tu can
vi cua » vai cua, di cua
xuc va » duc va, tuc va, luc va
cua te » cua tu
san ky » sang ky, van ky, dan 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: tu san ky ((nang x) OR (nang ma)) hoi. nhien ((viet cac) OR (viet ca)) xuc va trinh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((nang x) or (nang ma)) hoi. nhien ((viet cac) OR (viet ca)) xuc va trinh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang x) or (nang ma)) hoi. nhien ((viet cac) OR (viet ca)) xuc va trinh vi cua te*.