Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
nam xua » nam cua, nam mua, nam qua
nam xuc » cam xuc, nam thuc, nam duoc
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
su sac » su sach, su cac, su xac
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang ((o hoi) or (xa hoi)). lieu va ((nam xuc) OR (nam xua)) va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang ((o hoi) OR (xa hoi)). lieu va ((nam xuc) OR (nam xua)) va hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang ((o hoi) or (xa hoi)). lieu va ((nam xuc) OR (nam xua)) va hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ((o hoi) or (xa hoi)). lieu va ((nam xuc) OR (nam xua)) va hanh di cua tre*.