Perhaps you should try some spelling variations:
thong cong » tong cong, thong thong, phong chong
hieu manh » chieu xanh, hieu nganh, dieu hanh
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
hoc hieu » hoc thieu, hoc hien, doc hieu
san phan » san pham, van phan, sat phan
phan lap » phan dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((canh manh) OR (lanh manh)) cua ((thong cong) OR (trong cong)) san phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - ((canh manh) or (lanh manh)) cua ((thong cong) OR (trong cong)) san phan lap~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((canh manh) or (lanh manh)) cua ((thong cong) OR (trong cong)) san phan lap*.