Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
kinh vai » kinh hai, kinh va, kinh van
vai cua » dai cua, hai cua, lai cua
va kinh » va tinh, qua kinh
cac lao » cac loai, cac giao, cac lang
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ca lao » cua lao, ca dao, ca cao
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang x hoi. dieu hien ((cac lao) OR (ca lao)) va kinh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach ty)) nang x hoi. dieu hien ((cac lao) or (ca lao)) va kinh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach ty)) nang x hoi. dieu hien ((cac lao) or (ca lao)) va kinh vai cua tre*.