Perhaps you should try some spelling variations:
hien chao » hien phap, vien cao, dien cho
dieu hien » dieu khien, dieu kien, bieu hien
cac thoi » cac toi, cac hop, cac tro
hanh vai » hanh vi, hanh va, hanh tai
cac khoi » cac khoan, cach thoi, hoc khoi
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
ke va » te va
xu va » xu van, tu va, su va
ky va » ly va, my va, ky la

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) OR (ke va)) ((cac khoi) or (cac thoi)). dieu hien chao xu va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ((ky va) OR (ke va)) ((cac khoi) OR (cac thoi)). dieu hien chao xu va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ((ky va) OR (ke va)) ((cac khoi) or (cac thoi)). dieu hien chao xu va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ((ky va) OR (ke va)) ((cac khoi) or (cac thoi)). dieu hien chao xu va hanh vai cua tre*.