Perhaps you should try some spelling variations:
van quang » van quan, tran quang, van tuan
nam truc » nam truoc, nam thuc, nam trung
truc ban » thuc ban, truc dan, truc van
ban hanh » ban hang
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
hanh de » hanh ve, hanh kem
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
ve nam » he nam, va nam, le nam

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 ((van ban) or (van quang)) x ho. hieu ve nam truc ban hanh de ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((van ban) OR (van quang)) x ho. hieu ve nam truc ban hanh de ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((van ban) or (van quang)) x ho. hieu ve nam truc ban hanh de ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: so sach ((van ban) or (van quang)) x ho. hieu ve nam truc ban hanh de ((cuu tre) OR (cua tre))*.