Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
hanh sua » hinh su, hanh va, hanh tu
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
cau luc » cau truc, cau phuc
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
luc va » duc va, tuc va, loc va
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. ((hieu ve) OR (hieu van)) cau luc va hanh sua ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. ((hieu ve) OR (hieu van)) cau luc va hanh sua ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. ((hieu ve) OR (hieu van)) cau luc va hanh sua ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. ((hieu ve) OR (hieu van)) cau luc va hanh sua ((cua triet) or (cua viet))*.