Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cau » vien cac, vien cao, vien sau
cau phuc » cau truc, chau phu, huu phuc
hai cua » thai cua, dai cua, hoi cua
van anh » van thanh, tuan anh, van minh
va hanh » van hanh, va thanh, va danh
tu cach » tu cac
nang xa » nang x, lang xa, nang ma
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (tu sach)) ky nang xa hoi. hieu vien cau phuc ((va hanh) or (van anh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (tu sach)) ky nang xa hoi. hieu vien cau phuc ((va hanh) OR (van anh)) hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (tu sach)) ky nang xa hoi. hieu vien cau phuc ((va hanh) or (van anh)) hai cua tre*.