Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hien phap » bien phap
cac thoi » cac toi, cac hop, cac tro
phap xu » phap tu, phap thu, phap ngu
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, bai cua
lai cua » dai cua, hai cua, lai chau
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai 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 sac ky va cac thoi. dieu hien phap xu va hanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky va cac thoi. dieu hien phap xu va hanh ((vai cua) OR (lai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky va cac thoi. dieu hien phap xu va hanh ((vai cua) or (lai cua)) tre*.