Perhaps you should try some spelling variations:
thuoc dieu » thuc dieu, hoc dieu, thuat dieu
hanh tranh » canh tranh, hanh trinh, hanh trang
trong tam » trong lam, trong nam, trong tan
tranh su » trinh su, trang su, tranh cua
tam toan » tap toan, tam than, pham toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc dieu) or (theo tieu)) hanh - hanh tranh su dung trong tam toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc dieu) OR (theo tieu)) hanh - hanh tranh su dung trong tam toan cau.
• Adding a wildcard symbol may retrieve word variants: ((thuoc dieu) or (theo tieu)) hanh - hanh tranh su dung trong tam toan cau*.