Perhaps you should try some spelling variations:
may trinh » may tinh, lap trinh, quy trinh
trinh ve » trinh he, trinh va, trinh vi
sang tao » hang tai
te sach » toc sach
soc may » hoc may, so may
tu cham » toc cham, thi cham
vu cham » va cham, vu kham, qua cham
sach ty » sach y, sach tu, sach thu
sang ma » tang ma, nang ma, mang may
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: te sach ty ((sang ma) or (sang tao)) hoi. hieu ((vu cham) OR (tu cham)) soc may trinh ve cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((sang ma) OR (sang tao)) hoi. hieu ((vu cham) OR (tu cham)) soc may trinh ve cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((sang ma) or (sang tao)) hoi. hieu ((vu cham) OR (tu cham)) soc may trinh ve cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((sang ma) or (sang tao)) hoi. hieu ((vu cham) OR (tu cham)) soc may trinh ve cua tu*.