Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
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: ((hoc thieu) or (doi chi)) sach - hanh tranh va ((nhung cong) or (thong cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chi)) sach - hanh tranh va ((nhung cong) OR (thong cong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chi)) sach - hanh tranh va ((nhung cong) or (thong cong)) dan toan ban*.