Perhaps you should try some spelling variations:
cong thuong » hang thuong
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
trang chan » trang cham, trong chan, tranh chap
chan cong » phan cong, chan hong, chat cong
lan toan » dan toan, lap toan, manh toan
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (chieu sach)) - hanh trang chan cong thuong ((lan toan) OR (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu sach)) - hanh trang chan cong thuong ((lan toan) OR (van toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu sach)) - hanh trang chan cong thuong ((lan toan) OR (van toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu sach)) - hanh trang chan cong thuong ((lan toan) OR (van toan)) cau*.