Perhaps you should try some spelling variations:
trinh ve » trinh he, trinh va, trinh vi
va trinh » van trinh, va tinh, lap trinh
cau nuoc » cap nuoc, cac nuoc, dau nuoc
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
van cau » van dau, van hau, van chat
sach ty » sach tu, sach thu, xach tay
ang xa » lang xa, mang xa, hoang xa
ve cua » le cua, de cua, te cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach y)) ((ang xa) OR (dang xay)) hoi. hieu van cau nuoc va trinh ve cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) ((ang xa) OR (dang xay)) hoi. hieu van cau nuoc va trinh ve cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) ((ang xa) OR (dang xay)) hoi. hieu van cau nuoc va trinh ve cua tu".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) ((ang xa) OR (dang xay)) hoi. hieu van cau nuoc va trinh ve cua tu*.