Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
ve triet » va trien, su triet
va trinh » van trinh, va tinh, lap trinh
sach thu » sach thue, sach thieu, sach tham
ve cham » va cham, ve chat, vu cham
su sach » so sach, vu sach
sang ma » tang ma, nang ma, sang tao
lang xa » lang ha, dang xay, lang van
loc va » hoc va, luc va
van ve » van de, ban ve, van le
ve cam » ve cac, va cam, ve cai

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 xa) or (sang ma)) hoi. hieu ((ve cam) OR (ve cham)) loc va trinh van ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((lang xa) OR (sang ma)) hoi. hieu ((ve cam) OR (ve cham)) loc va trinh van ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu ((lang xa) or (sang ma)) hoi. hieu ((ve cam) OR (ve cham)) loc va trinh van ve triet".
• Adding a wildcard symbol may retrieve word variants: su sach thu ((lang xa) or (sang ma)) hoi. hieu ((ve cam) OR (ve cham)) loc va trinh van ve triet*.