Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
van thanh » ban thanh, van tuan
so sach » so sanh, bo sach, hoc sach
tri cuu » tri cua, tra cuu, trinh cuu
xuc van » duc van, luc van, vuc van
ban xuc » ban xu, ban duoc, ban phuc
thi van » thi lan, thi hanh, thi nang
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
co sach » bo sach, cuon sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (co sach)) ky ((nang xa) OR (nang ma)) hoi. thi van ban xuc van thanh tri cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ky ((nang xa) OR (nang ma)) hoi. thi van ban xuc van thanh tri cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (co sach)) ky ((nang xa) OR (nang ma)) hoi. thi van ban xuc van thanh tri cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ky ((nang xa) OR (nang ma)) hoi. thi van ban xuc van thanh tri cuu tre*.