Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hien chao » hien phap, vien cao, dien cho
cac khoi » cac thoi, cac khoan, cach thoi
van hanh » van thanh, ban hanh, van anh
va hanh » va thanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ky va » ly va, ke va, my 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 sai ky va cac khoi. dieu hien chao xu ((va hanh) OR (van hanh)) vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky va cac khoi. dieu hien chao xu ((va hanh) OR (van hanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky va cac khoi. dieu hien chao xu ((va hanh) OR (van hanh)) vai cua tre*.