Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tu tren » tu truyen, tu tieng, tu trong
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
danh vi » hanh vi, dinh vi, danh di
nang ro » nang co, nang ho, nang ra
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
sai ky » sac ky
ro hoc » co hoc, mo hoc, o hoc
tu sai » tu bai, tu san, tu cai

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

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