Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trang » thanh trung, canh tranh, hanh trinh
thanh toan » thanh hoa, thanh san, tinh toan
hieu lang » chieu sang, hieu quang, nhieu tang
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
hach toan » manh toan
hoc hieu » hoc thieu, hoc hien, doc hieu

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

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