Perhaps you should try some spelling variations:
dau truc » cau truc, doan truc, dau tu
dai truc » dai thuc, doan truc, dai trung
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
van hanh » van thanh, ban hanh, van anh
vai cuu » vai cua
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo

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) or (sach thu)) nang xa hoi. lieu va ((dau truc) OR (dai truc)) van hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach thu)) nang xa hoi. lieu va ((dau truc) OR (dai truc)) van hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach thu)) nang xa hoi. lieu va ((dau truc) OR (dai truc)) van hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach thu)) nang xa hoi. lieu va ((dau truc) OR (dai truc)) van hanh vai cuu tre*.