Perhaps you should try some spelling variations:
danh viet » anh viet, nang viet, dao viet
ninh viet » sinh vien, anh viet
te sach » toc sach
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, cua triet
y xang » ty xang
ma hoi » mai hoi, xa hoi, me hoi
ve cac » va cac, vien cac

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 y xang ((ma hoi) or (ma hoa)). hieu ve cac duc va ((danh viet) OR (ninh viet)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y xang ((ma hoi) OR (ma hoa)). hieu ve cac duc va ((danh viet) OR (ninh viet)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y xang ((ma hoi) or (ma hoa)). hieu ve cac duc va ((danh viet) OR (ninh viet)) cua tre*".