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 thiet » hoc thieu, hoc thuyet, hoc hien
tranh cua » doanh cua, manh cua
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thieu) or (hoc thiet)) anh - hanh tranh cua ((nhung cong) OR (thong cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (hoc thiet)) anh - hanh tranh cua ((nhung cong) OR (thong cong)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc thieu) or (hoc thiet)) anh - hanh tranh cua ((nhung cong) OR (thong cong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((toc thieu) or (hoc thiet)) anh - hanh tranh cua ((nhung cong) OR (thong cong)) dan toan cao*.