Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh tai » thanh hai, thanh toan, doanh tai
cam duc » cam xuc, pham duc, nam duoc
tai cua » thai cua, tai cuc, tri cua
cao duc » dao duc, cao suc, giao duc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y nang) or (ly nang)) xa hoi. hieu ve ((cam duc) OR (cao duc)) gia thanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ly nang)) xa hoi. hieu ve ((cam duc) OR (cao duc)) gia thanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (ly nang)) xa hoi. hieu ve ((cam duc) OR (cao duc)) gia thanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (ly nang)) xa hoi. hieu ve ((cam duc) OR (cao duc)) gia thanh tai cua triet*.