Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
thanh de » hanh de, thanh ve, thanh do
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
hoi hoi » hoi hoc, hoc hoi, hoi doi
xac ky » cac ky, bac ky
ho hoi » hoc hoi, hoa hoi, co hoi
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((xac ky) OR (sac ky)) nang ((ho hoi) or (hoi hoi)). hieu ve cam tuc van thanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((xac ky) OR (sac ky)) nang ((ho hoi) OR (hoi hoi)). hieu ve cam tuc van thanh de cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((xac ky) OR (sac ky)) nang ((ho hoi) or (hoi hoi)). hieu ve cam tuc van thanh de cua triet*".