Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
cach tu » cach thuc
hanh te » hanh tu, hanh ve, hanh de
duc van » duc va, duc tan, duc manh
va chat » van chat, va phat, cao chat
tu cach » tu cac
nong xa » song xa, dong xa, nong va
va cham » va tham
nong x » nang x, nong e, nong o
te cua » tue cua, le cua, de 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 cach tu ((nong x) or (nong xa)) hoi. hieu ((va cham) OR (va chat)) duc van hanh te cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu ((nong x) OR (nong xa)) hoi. hieu ((va cham) OR (va chat)) duc van hanh te cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach tu ((nong x) or (nong xa)) hoi. hieu ((va cham) OR (va chat)) duc van hanh te cua triet".
• Adding a wildcard symbol may retrieve word variants: tu cach tu ((nong x) or (nong xa)) hoi. hieu ((va cham) OR (va chat)) duc van hanh te cua triet*.