Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
han tri » han tai, van tri, thanh tri
va han » va phan, van han, va hanh

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) or (toc sach)) ky nang xa hoi. lieu va ((cam duc) OR (cao duc)) va han tri cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky nang xa hoi. lieu va ((cam duc) OR (cao duc)) va han tri cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky nang xa hoi. lieu va ((cam duc) OR (cao duc)) va han tri cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang xa hoi. lieu va ((cam duc) OR (cao duc)) va han tri cua triet*.