Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
tham luu » tam luu, thanh luu, cham cuu
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
su triet » su viet, su tien, ve triet
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
luu ban » luu bang, luu van, luu dan
x hoi » xa hoi, o hoi, 5 hoi

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

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