Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
van hai » van ha, van chat, van phan
lang xa » lang ha, dang xay, lang van
can ky » van ky, ban ky, tan ky
dan ky » van ky
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((can ky) or (dan ky)) lang xa hoi. hieu ((van hai) OR (van hanh)) luc va thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((can ky) OR (dan ky)) lang xa hoi. hieu ((van hai) OR (van hanh)) luc va thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((can ky) or (dan ky)) lang xa hoi. hieu ((van hai) OR (van hanh)) luc va thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((can ky) or (dan ky)) lang xa hoi. hieu ((van hai) OR (van hanh)) luc va thanh vi cua triet*.