Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dan khai » dang khai, van khai, dang khoi
tu sach » thu sach, su sach, te sach
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
dan hai » doan hai, dang hai, van hai
va cam » va cham, va cac, va cao
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: tu sach ((ky lang) or (ky nang)) xa hoi. hieu va cam xuc va ((dan hai) OR (dan khai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky nang)) xa hoi. hieu va cam xuc va ((dan hai) OR (dan khai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky nang)) xa hoi. hieu va cam xuc va ((dan hai) OR (dan khai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky nang)) xa hoi. hieu va cam xuc va ((dan hai) OR (dan khai)) cua triet*.