Perhaps you should try some spelling variations:
hoc trong » hoc thuong, hoc tieng, dot trong
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
chao yen » chao sen, chao yang, hai yen
he khong » he thong
toan cao » toan ban, toan tap
ho yen » o yen, hong yen

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho yen) OR (chao yen)) tinh - canh tranh ((hoc trong) or (he khong)) cong danh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho yen) OR (chao yen)) tinh - canh tranh ((hoc trong) OR (he khong)) cong danh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho yen) OR (chao yen)) tinh - canh tranh ((hoc trong) or (he khong)) cong danh toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho yen) OR (chao yen)) tinh - canh tranh ((hoc trong) or (he khong)) cong danh toan cao*.