Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chieu » hoc thieu, ho chieu, hoc dieu
tranh cua » doanh cua, manh cua
hoang van » hang va
cua tong » cua cong, cua dong, cua nong
cong van » cong vang, cong san, song van
tan tap » toan tap, han tap, tan tat

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) or (hoc hien)) sach - hanh tranh cua tong ((cong van) or (hoang van)) tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc hien)) sach - hanh tranh cua tong ((cong van) OR (hoang van)) tan tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc hien)) sach - hanh tranh cua tong ((cong van) or (hoang van)) tan tap*.