Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
hanh trinh » canh tranh, hanh chinh
quan tre » quan tren, quan tri, quang tri
hieu van » hieu va, thien van, lieu va
nang xa » lang xa, nang ma, mang xa
van bao » van ban, van dao
bao xuc » bao luc, bao thuc
va hanh » van hanh, va thanh, va danh
co sach » bo sach, cuon sach, hoc sach
so sach » so sanh, bo sach, hoc sach
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) OR (co sach)) ky ((nang xa) or (nang x)) hoi. hieu van bao xuc va hanh trinh quan tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ky ((nang xa) OR (nang x)) hoi. hieu van bao xuc va hanh trinh quan tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ky ((nang xa) or (nang x)) hoi. hieu van bao xuc va hanh trinh quan tre*".