Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dua tren » dung tren
cham doc » cham soc, chat doc, chau doc
dan vai » dan va, dan tai, dan vat
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
ve cham » va cham, ve chat, vu cham
sach v » sach va, sach y, sach 2
doc va » duoc va, hoc va, duc va
va dan » ca dan, va dao, va dau
ma hoi » mai hoi, xa hoi, me hoi
v nang » va nang, vu nang, van nang

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 v nang ((ma hoi) OR (ma hoa)). hieu ve cham doc va dan vai ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang ((ma hoi) OR (ma hoa)). hieu ve cham doc va dan vai ((dua tren) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang ((ma hoi) OR (ma hoa)). hieu ve cham doc va dan vai ((dua tren) or (cua triet))*".