Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
bang toan » dang toan, bang thanh, quang toan
bong toan » cong toan, phong toan, trong toan
trinh va » trinh van, trinh vat, trinh ve

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 manh) or (chieu xanh)) - hanh trinh va nhung cong ((bang toan) OR (bong toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - hanh trinh va nhung cong ((bang toan) OR (bong toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu xanh)) - hanh trinh va nhung cong ((bang toan) OR (bong toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - hanh trinh va nhung cong ((bang toan) OR (bong toan)) cau*.