Perhaps you should try some spelling variations:
kien sach » dien sach, vien bach, kien mac
hang cong » dang cong, hang nong, bang cong
cong quan » cuong quan, cong quang, tong quan
hoc kien » hoc hien, hoc vien, hoa kien
manh cua » doanh cua
luan cau » quan cau, lua cau, luat cau
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc kien sach - canh ((manh cua) or (ban cua)) hang cong quan luan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kien sach - canh ((manh cua) OR (ban cua)) hang cong quan luan cau.
• Adding a wildcard symbol may retrieve word variants: hoc kien sach - canh ((manh cua) or (ban cua)) hang cong quan luan cau*.