Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
dien sach » dien anh
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
hoc dien » hoc hien, hoc vien, hoc dieu
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dien sach - hanh tranh ((cua dung) OR (cua dang)) cong hach toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dien sach - hanh tranh ((cua dung) OR (cua dang)) cong hach toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc dien sach - hanh tranh ((cua dung) OR (cua dang)) cong hach toan ban*.