Perhaps you should try some spelling variations:
hanh tang » hanh trang, hanh mang, hanh tung
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
anh tang » anh bang, anh dang, anh nang
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - ((hanh tang) OR (anh tang)) luan dang cong ((dan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - ((hanh tang) OR (anh tang)) luan dang cong ((dan toan) OR (dan than)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - ((hanh tang) OR (anh tang)) luan dang cong ((dan toan) or (dan than)) cau*".