Perhaps you should try some spelling variations:
hieu toan » bieu toan, thien toan, hieu van
kiem toan » ke toan, kiem tra
duc tuan » duc thuan, duc tan, duc toan
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
anh bai » sach bai, danh bat, hinh bai
ca tren » cau tren, cu tren, la 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 nang xa hoi. ((hieu toan) or (kiem toan)) giao duc tuan anh bai ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu toan) OR (kiem toan)) giao duc tuan anh bai ca tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu toan) or (kiem toan)) giao duc tuan anh bai ca tren*.