Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hien chao » hien phap, vien cao, dien cho
cac thoi » cac toi, cac hop, cac tro
cac khoi » cac khoan, cach thoi, hoc khoi
hanh dai » hanh tai, hanh dao, vanh dai
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
ky va » ly va, ke va, my va
xu va » xu van, tu va, su 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 cai ky va ((cac khoi) or (cac thoi)). dieu hien chao xu va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky va ((cac khoi) OR (cac thoi)). dieu hien chao xu va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu cai ky va ((cac khoi) or (cac thoi)). dieu hien chao xu va hanh dai cua tre*.