Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
va tinh » may tinh
va hanh » van hanh, va thanh, va danh
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
hoa doi » hoa dai, hoc doi, xoa doi
hoa hoi » khoa hoi, hoa hoc, hoc hoi
sac ky » cac ky, sai ky
ve cao » va cao, ve bao, ve cac
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((hoa hoi) OR (hoa doi)). hieu ve cao duc ((va hanh) or (va tinh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((hoa hoi) OR (hoa doi)). hieu ve cao duc ((va hanh) OR (va tinh)) dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((hoa hoi) OR (hoa doi)). hieu ve cao duc ((va hanh) or (va tinh)) dai cua tre*".