Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
cong bang » cuong bang, dong bang, hong bang
han hang » hang hang, han chang, van hang
ban hang » ngan hang
bang bai » bang bac, bang hai, dang bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh trinh ((han hang) OR (ban hang)) cong bang bai tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh trinh ((han hang) OR (ban hang)) cong bang bai tap".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trinh ((han hang) OR (ban hang)) cong bang bai tap*.