Perhaps you should try some spelling variations:
trong chuong » trong thuong, thong chuong, trong chong
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu tinh » trieu tinh, lieu tinh, chau tinh
chuong dan » huong dan, chuong han, chuong dong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua trong » cua truong, cua trung, qua trong
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 tinh)) - hanh tranh cua trong chuong dan ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu tinh)) - hanh tranh cua trong chuong dan ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu tinh)) - hanh tranh cua trong chuong dan ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu tinh)) - hanh tranh cua trong chuong dan ((toan cau) OR (toan ban))*.