Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
bach xuc » bach tuoc, bach xuan, bach hue
thanh va » thanh van, hanh va, thanh ha
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, te sach
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
xuc gia » duc gia, luc gia, tuc gia
cuu tre » cua tre, cau tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky tang) OR (ky dang)) xa hoi. hieu vien bach xuc gia thanh va ((cau treo) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky tang) OR (ky dang)) xa hoi. hieu vien bach xuc gia thanh va ((cau treo) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky tang) OR (ky dang)) xa hoi. hieu vien bach xuc gia thanh va ((cau treo) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky tang) OR (ky dang)) xa hoi. hieu vien bach xuc gia thanh va ((cau treo) or (cuu tre))*.