Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
hanh tri » hanh tai, hanh trinh, hanh triet
hieu van » hieu va, thien van, lieu va
bao xuc » bao luc, bao thuc
van bao » van ban, van dao
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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 ky) or (sach y)) nang xa hoi. hieu van bao xuc va ((hanh tri) OR (thanh tri)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sach y)) nang xa hoi. hieu van bao xuc va ((hanh tri) OR (thanh tri)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) or (sach y)) nang xa hoi. hieu van bao xuc va ((hanh tri) OR (thanh tri)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) or (sach y)) nang xa hoi. hieu van bao xuc va ((hanh tri) OR (thanh tri)) cua tre*.