Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
hieu van » hieu va, thien van, lieu va
quan tre » quan tren, quan tri, quang tri
bo sach » co sach, hoc sach
sach ky » sac ky, sach y, sach ty
van bao » van ban, van dao
bao xuc » bao luc, bao thuc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ky nang x hoi. hieu van bao xuc ((va hanh) or (va danh)) trinh quan tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ky nang x hoi. hieu van bao xuc ((va hanh) OR (va danh)) trinh quan tre.
• Adding a wildcard symbol may retrieve word variants: bo sach ky nang x hoi. hieu van bao xuc ((va hanh) or (va danh)) trinh quan tre*.