Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, dua tren
su hai » su tai
hai ky » thai ky, hoi ky, hai ly
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su hai ky dang xa hoi. hieu ve cam duc ((van ban) or (ban hanh)) thai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su hai ky dang xa hoi. hieu ve cam duc ((van ban) OR (ban hanh)) thai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su hai ky dang xa hoi. hieu ve cam duc ((van ban) or (ban hanh)) thai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su hai ky dang xa hoi. hieu ve cam duc ((van ban) or (ban hanh)) thai ((cua tre) OR (cua triet))*.