Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
hoa hoi » khoa hoi, hoa hoc, hoa doi
hieu va » lieu va, hieu qua
cam luc » cam xuc
vi cua » vai cua, di cua
su sai » su tai, su hai, su dai
sai ky » sac ky

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

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