Perhaps you should try some spelling variations:
tay lang » tai lang, tay quang, tham lang
tay tang » tay trung, tay quang, tay tieng
su sach » so sach, vu sach
dinh du » dinh duc, dinh cu, dinh tu
danh di » danh du, xanh di, danh dien
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
am hoc » ad hoc
ve am » va am

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 ((tay lang) OR (tay tang)) xa hoi. hieu ve am hoc va ((danh di) or (dinh du)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tay lang) OR (tay tang)) xa hoi. hieu ve am hoc va ((danh di) OR (dinh du)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tay lang) OR (tay tang)) xa hoi. hieu ve am hoc va ((danh di) or (dinh du)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((tay lang) OR (tay tang)) xa hoi. hieu ve am hoc va ((danh di) or (dinh du)) cua tre*.