Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
kien chao » vien cao, dien cho, khien cho
dieu kien » dieu khien, dien bien
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
my va » may va, ly va, me va
xu va » xu van, su va, vu va
ky va » ly va, ke 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 sac ((ky va) or (my va)) cach thoi. dieu kien chao ((xu va) or (tu va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky va) OR (my va)) cach thoi. dieu kien chao ((xu va) OR (tu va)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky va) or (my va)) cach thoi. dieu kien chao ((xu va) or (tu va)) hanh vai cua tre*.