Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
tham xuc » tham nuoc, tham thuc, pham duc
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
ly hang » ly quang
ty hang » ty xang, thi hang, thu hang
cua tre » cua te, cuu tre, dua tren
co sach » bo sach, cuon sach, hoc sach
xuc va » duc va, tuc va, luc va

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 ((ty hang) or (ly hang)) xa hoi. hieu van tham xuc va thanh ve ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((ty hang) OR (ly hang)) xa hoi. hieu van tham xuc va thanh ve ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((ty hang) or (ly hang)) xa hoi. hieu van tham xuc va thanh ve ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: co sach ((ty hang) or (ly hang)) xa hoi. hieu van tham xuc va thanh ve ((cua tre) OR (cua triet))*.