Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
cac khoi » cac thoi, cac khoan, cach thoi
hien cao » vien cao, hien cac, hien cau
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu san, tu bac
vi cua » vai cua, di cua
ky va » ly va, ke va, my va
su va » su van, tu 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) or (tu cac)) ky va cac khoi. dieu hien cao su va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky va cac khoi. dieu hien cao su va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu cac)) ky va cac khoi. dieu hien cao su va hanh vi cua tre*.