Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dong cong » duong cong, dung cong, dang cong
cong tinh » cong trinh, cong vinh, long tinh
toc hieu » toc thieu, doc hieu, hoc thieu
cua dong » chua dong, cua cong, cua dang
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: toc hieu manh - ((hanh tranh) OR (canh tranh)) cua dong cong tinh toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc hieu manh - ((hanh tranh) OR (canh tranh)) cua dong cong tinh toan tap".
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - ((hanh tranh) OR (canh tranh)) cua dong cong tinh toan tap*.