Perhaps you should try some spelling variations:
nhung cuong » nhung cong, hung cuong, nhung chong
theo chieu » theo tieu, ho chieu, theo chu
thanh hang » thanh hoang, thanh thang, tranh hang
mot chieu » doi chieu, ho chieu
hanh hang » hang hang, hanh han, hanh mang
cua nhung » va nhung
cuong bai » uong bi, cuong ma
bai toan » bai tap
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (mot chieu)) xanh - ((hanh hang) OR (thanh hang)) cua nhung cuong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (mot chieu)) xanh - ((hanh hang) OR (thanh hang)) cua nhung cuong bai toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (mot chieu)) xanh - ((hanh hang) OR (thanh hang)) cua nhung cuong bai toan cau*".