Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh bang » anh bang, hanh mang, lanh bang
trong dan » trong dang, trong san, trong tan
bang vat » bang va, dang vat, cang vat
vat dung » van dung, va dung, viet dung
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 ((chieu tinh) or (chinh sach)) - hanh bang vat dung trong dan ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chinh sach)) - hanh bang vat dung trong dan ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (chinh sach)) - hanh bang vat dung trong dan ((toan cau) or (toan tap))*.