Perhaps you should try some spelling variations:
ngang thanh » nang thanh, nganh thanh, ngan thanh
cong ngang » cong nhan, cong quang, cong lang
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
lanh manh » lanh tranh, lan anh, van manh
thanh chu » thanh chau, thanh cha, thanh thu
anh manh » anh anh, anh danh, ranh mach
ban cong » bang cong, van cong, phan cong

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 ((thieu xanh) OR (hieu manh)) - ((anh manh) OR (lanh manh)) cua ban cong ngang thanh chu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - ((anh manh) or (lanh manh)) cua ban cong ngang thanh chu~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - ((anh manh) or (lanh manh)) cua ban cong ngang thanh chu*.