Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
cua tre » cua te, cuu tre, cua triet
dan lai » dan loai, dan lap, dan lat
ve cham » va cham, ve chat, vu cham
su sach » so sach, vu sach
ly hang » ly quang
ty hang » ty xang, thi hang, thu hang
hieu ve » hieu va, hieu van
soc va » hoc va, loc va, doc va
va dan » ca dan, va dao, va dau

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 ((ty hang) or (ly hang)) xa hoi. hieu ve cham soc va dan lai ((cua tre) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (ly hang)) xa hoi. hieu ve cham soc va dan lai ((cua tre) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (ly hang)) xa hoi. hieu ve cham soc va dan lai ((cua tre) or (dau tren))*.