Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhanh tinh » nhanh thanh, nhan sinh
tieu sach » chieu sach, dien sach, te sach
van hang » van khang, van hoang, van thang
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan ban » tuan bang, toan ban, luan ban
va hang » va nang, va lang, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - ((hanh trinh) or (nhanh tinh)) ((va hang) or (van hang)) cong van tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((hanh trinh) OR (nhanh tinh)) ((va hang) OR (van hang)) cong van tuan ban.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((hanh trinh) or (nhanh tinh)) ((va hang) or (van hang)) cong van tuan ban*.