Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
dan toan » van toan, dan than, manh toan
toan ban » van ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chi)) sach - hanh tranh va ((nhung cong) or (thong thong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chi)) sach - hanh tranh va ((nhung cong) OR (thong thong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chi)) sach - hanh tranh va ((nhung cong) or (thong thong)) dan toan ban*.