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

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 dai trung ((van hanh) or (van thanh)) 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 dai trung ((van hanh) OR (van thanh)) vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach thu)) nang xa hoi. lieu va dai trung ((van hanh) or (van thanh)) vai cuu tre*.