Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
thien van » thi van
trinh cua » tinh cua, trinh luat, trinh luan
hieu van » hieu va, lieu va, hieu ve
bao duc » dao duc, bao luc, cao duc
va hanh » van hanh, va thanh, va danh
su cac » tu cac, su cao, su can
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang x hoi. ((hieu van) or (thien van)) bao duc va hanh ((trinh cua) OR (trinh quan)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang x hoi. ((hieu van) OR (thien van)) bao duc va hanh ((trinh cua) OR (trinh quan)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang x hoi. ((hieu van) or (thien van)) bao duc va hanh ((trinh cua) OR (trinh quan)) tre".
• Adding a wildcard symbol may retrieve word variants: su cac ky nang x hoi. ((hieu van) or (thien van)) bao duc va hanh ((trinh cua) OR (trinh quan)) tre*.