Perhaps you should try some spelling variations:
manh hai » lanh hai, minh hai, thanh hai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » co hoi, cao hoc, tao hoi
hiem he » hiem xe, hieu he, thien he
xa manh » ha manh, van manh, day manh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
he nam » ha nam, nghe nam
thu xa » thu xac, thu ha, thu xe

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((cao hoi) or (cau hoi)). hiem he nam thu xa manh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((cao hoi) OR (cau hoi)). hiem he nam thu xa manh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((cao hoi) or (cau hoi)). hiem he nam thu xa manh hai cua tre*.