Perhaps you should try some spelling variations:
chuc nganh » chuc nang, hoc nganh, cac nganh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tang » hanh trang, anh tang, hanh mang
trinh han » trinh quan
va duong » van duong, va tuong, va huong
va dung » van dung, vat dung, va ung
han tap » han tai, toan tap, nhan tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc nganh) OR (chieu xanh)) - hanh tang ((va dung) OR (va duong)) cong trinh han tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc nganh) or (chieu xanh)) - hanh tang ((va dung) OR (va duong)) cong trinh han tap~".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc nganh) or (chieu xanh)) - hanh tang ((va dung) OR (va duong)) cong trinh han tap*.