Perhaps you should try some spelling variations:
xuan truong » xa truong, duong truong
hanh tranh » canh tranh, hanh trinh, hanh trang
cua truong » cua trung, cac truong, xa truong
phuong dan » phuong danh, phuong doan, huong dan
hoc sach » hoc sinh, hoc cac, hoc anh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
ho hoc » hoa hoc, cho hoc, hoi hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hoc sach - hanh tranh ((cua truong) or (xuan truong)) phuong dan ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hoc sach - hanh tranh ((cua truong) OR (xuan truong)) phuong dan ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hoc sach - hanh tranh ((cua truong) or (xuan truong)) phuong dan ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho hoc sach - hanh tranh ((cua truong) or (xuan truong)) phuong dan ((toan cau) OR (toan ban))*.