Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
chau tinh » cuu tinh, ha tinh, cua tinh
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
tang cua » mang cua, hang cua, tang luan
tan toan » tan tran, tap toan, van toan
toan ban » van 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 ((hieu manh) or (chau tinh)) - hanh tang cua ((dung cong) or (dang cong)) tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chau tinh)) - hanh tang cua ((dung cong) OR (dang cong)) tan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chau tinh)) - hanh tang cua ((dung cong) or (dang cong)) tan toan ban*.