Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
tri cuu » tri cua, tra cuu, trinh cuu
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: ((so sach) or (co sach)) ky nang xa hoi. thi van ban ((xuc van) OR (duc 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 hoi. thi van ban ((xuc van) OR (duc 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 hoi. thi van ban ((xuc van) OR (duc van)) thanh tri cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ky nang xa hoi. thi van ban ((xuc van) OR (duc van)) thanh tri cuu tre*.