Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh chap » tranh cua, trinh chat
nhung cong » thong cong, hang cong, nhung don
hien tach » thien hach, chiet tach, vien bach
dung cong » dung trong
toan cau » toan ban, toan tap, toan tai
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: hoc hien tach - hanh tranh chap ((nhung cong) OR (dung cong)) tan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tach - hanh tranh chap ((nhung cong) OR (dung cong)) tan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien tach - hanh tranh chap ((nhung cong) OR (dung cong)) tan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc hien tach - hanh tranh chap ((nhung cong) OR (dung cong)) tan ((toan cau) or (toan cao))*.