Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
thai dung » thai duong, thai vung, thi dung
dung cong » dung trong
ho thiet » hoc thiet, hoa thiet, hoc thieu
so thiet » soc thiet, hoc thiet, hoa thiet
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho thiet) or (so thiet)) tach - ((hanh tranh) OR (hanh trang)) thai dung cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho thiet) OR (so thiet)) tach - ((hanh tranh) OR (hanh trang)) thai dung cong tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho thiet) or (so thiet)) tach - ((hanh tranh) OR (hanh trang)) thai dung cong tan toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho thiet) or (so thiet)) tach - ((hanh tranh) OR (hanh trang)) thai dung cong tan toan ban*.