Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
hanh trang » thanh trung, canh tranh, hanh trinh
hoc thieu » toc thieu, hoc hien
trang cua » tranh cua, tang cua, trung cua
cong cong » cong dong, dung cong, dang cong
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: hoc thieu tach - hanh trang cua ((cong cong) or (trong cong)) tam toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - hanh trang cua ((cong cong) OR (trong cong)) tam toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - hanh trang cua ((cong cong) or (trong cong)) tam toan cau*.