Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong tinh » cong trinh, long tinh, cong thanh
cong vinh » cong trinh, trong vinh, cong viec
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) OR (cong vinh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu manh - ((hanh tranh) OR (canh tranh)) cua dong ((cong tinh) OR (cong vinh)) 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) OR (cong vinh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - ((hanh tranh) or (canh tranh)) cua dong ((cong tinh) OR (cong vinh)) toan tap*.