Perhaps you should try some spelling variations:
dua tren » dung tren
cam luc » cam xuc, cau luc
nang ro » nang co, nang ra, nang rong
cua tre » cua te, cuu tre, cua triet
nang ho » nang hoc, nang co, tang ho
danh vi » hanh vi, dinh vi, danh di
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
tu sac » tu sach, tu cac, tu san
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam

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 ro) or (nang ho)) hoi. hieu ve cam luc va danh vi ((cua tre) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang ro) OR (nang ho)) hoi. hieu ve cam luc va danh vi ((cua tre) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang ro) or (nang ho)) hoi. hieu ve cam luc va danh vi ((cua tre) or (dua tren))*.