Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va

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 co hoi. hieu ve cam ((xuc va) OR (duc va)) hanh vi ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang co hoi. hieu ve cam ((xuc va) OR (duc va)) hanh vi ((cua tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang co hoi. hieu ve cam ((xuc va) OR (duc va)) hanh vi ((cua tre) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang co hoi. hieu ve cam ((xuc va) OR (duc va)) hanh vi ((cua tre) or (cau tren))*.