Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien chat » van chat, vien cac, vien cao
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
lai cua » dai cua, hai cua, lai chau
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
sac ky » sai ky
ma hoi » mai hoi, ma hoa, me hoi

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) OR (cac ky)) nang ((ma hoi) or (xa hoi)). hieu vien chat xuc van hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) nang ((ma hoi) OR (xa hoi)). hieu vien chat xuc van hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (cac ky)) nang ((ma hoi) or (xa hoi)). hieu vien chat xuc van hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (cac ky)) nang ((ma hoi) or (xa hoi)). hieu vien chat xuc van hanh lai cua tre*.