Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ly quang » le quang, vu quang
cac thuc » cach thuc, cac thu, can thuc
thuc gia » thuc giai, thue gia, thuc dia
thanh vi » hanh vi, thanh va, thanh ve
co sach » bo sach, cuon sach, hoc sach
ly vang » ly hang, ly van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, dua tren

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ((ly quang) or (ly vang)) xa hoi. hieu va cac thuc gia thanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((ly quang) OR (ly vang)) xa hoi. hieu va cac thuc gia thanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: co sach ((ly quang) or (ly vang)) xa hoi. hieu va cac thuc gia thanh vi ((cua tre) or (cua triet))*.