Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh mang » nhanh mang, hanh trang, nhanh lang
bang cong » dang cong, bang song, hang cong
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap
va bang » va nang, va lang, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - ((hanh mang) or (canh tranh)) va bang cong dan ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((hanh mang) OR (canh tranh)) va bang cong dan ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh mang) or (canh tranh)) va bang cong dan ((toan tai) or (toan cao))*.