Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach
thuat tach » thuat sach, thuat mach, thuat tac
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, cong tan
tranh cua » doanh cua, manh cua
bang cong » dang cong, bang song, hang cong
cua bang » chua bang, cua ban, cua dang
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: so ((thiet tach) OR (thuat tach)) - hanh tranh cua bang cong thanh ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((thiet tach) OR (thuat tach)) - hanh tranh cua bang cong thanh ((toan cao) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((thiet tach) OR (thuat tach)) - hanh tranh cua bang cong thanh ((toan cao) or (van ban))".
• Adding a wildcard symbol may retrieve word variants: so ((thiet tach) OR (thuat tach)) - hanh tranh cua bang cong thanh ((toan cao) or (van ban))*.