Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
hanh hang » thanh hang, hang hang, hanh han
hach toan » thanh toan, manh toan
chu xanh » chu manh, chieu xanh, chua xang
hang cua » mang cua, hang ca, huong cua
tap toan » tap doan, tap quan, bai toan
chu han » chu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu xanh) or (chu han)) - hanh hang cua nhung cong ((tap toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chu han)) - hanh hang cua nhung cong ((tap toan) OR (hach toan)) cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chu han)) - hanh hang cua nhung cong ((tap toan) or (hach toan)) cau*.