Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cam thu » nam thu, cac thu, ca thu
thu ban » thu hang
cua tre » cua te, cuu tre, dua tren
va cam » va cham, va cac, va cao

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

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