Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
nang ro » nang co, nang ho, nang ra
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
tuc va » thuc va, truc va, tuc xa
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
ve cam » ve cham, va cam, ve cai
ro hoi » co hoi, o hoi, mo hoi
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cai ky nang ro hoi. hieu ((ve cam) or (ve cac)) tuc va hanh vi ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky nang ro hoi. hieu ((ve cam) OR (ve cac)) tuc va hanh vi ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu cai ky nang ro hoi. hieu ((ve cam) or (ve cac)) tuc va hanh vi ((cua tre) or (cau tren))*.