Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien tinh » khien tinh, thien tinh, bien tinh
tranh cua » doanh cua, manh cua
vat cong » bat cong, sat cong, vat con
cong san » cong tac
toan cao » toan ban
toan tap » toan ban

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 tinh - hanh tranh cua vat cong san ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - hanh tranh cua vat cong san ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - hanh tranh cua vat cong san ((toan cao) or (toan tap))*.