Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
su triet » su viet, su tien
sach thu » sach thue, sach thieu, sach tham
lang van » dang van, tang van, hoang van
ve triet » va trien
va trinh » van trinh, va tinh, lap trinh
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
cam lo » nam lo, cam ly, cam o
ve cam » ve cham, ve cac, va cam
lo va » lo van, lao va, ly va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu ((lang van) or (sang ma)) hoi. hieu ve cam lo va trinh vat ((ve triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((lang van) OR (sang ma)) hoi. hieu ve cam lo va trinh vat ((ve triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach thu ((lang van) or (sang ma)) hoi. hieu ve cam lo va trinh vat ((ve triet) or (su triet))*.