Perhaps you should try some spelling variations:
hanh trang » thanh trung, hanh trinh, minh trang
nhung cong » dung cong, thong cong, hang cong
kinh sach » sinh sach, dinh sach, tinh sach
hoc kinh » hoc sinh, luoc kinh
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tai
toan tap » toan 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 kinh sach - ((hanh trang) or (canh tranh)) va nhung cong dan ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kinh sach - ((hanh trang) OR (canh tranh)) va nhung cong dan ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc kinh sach - ((hanh trang) or (canh tranh)) va nhung cong dan ((toan cau) or (toan tap))*.