Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac thuc » cach thuc, cac thu, can thuc
thuc gia » thuc giai, thue gia, thuc dia
thanh vi » hanh vi, thanh va, thanh ve
so sach » so sanh, bo sach, co sach
ly nang » ky nang, ly hang, ly quang
ly vang » ly hang, ly van, ly quang
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: so sach ((ly nang) 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: so sach ((ly nang) OR (ly vang)) xa hoi. hieu va cac thuc gia thanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ly nang) 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: so sach ((ly nang) OR (ly vang)) xa hoi. hieu va cac thuc gia thanh vi ((cua tre) or (cua triet))*.