Perhaps you should try some spelling variations:
trinh cua » tinh cua, trinh quan, trinh luan
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
van bao » van ban, van dao
bao xuc » bao luc, bao thuc
va hanh » van hanh, va thanh, va danh
su cac » su cao, su can, eu cac
xuc va » duc va, tuc va, luc va

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