Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trinh » canh tranh, hanh chinh
dang cong » dung cong
cong sang » cong san, cong lang, cong vang
sang than » cang thang, dang thanh, sang tao
trinh va » trinh van, trinh vat, trinh ve
than cau » toan cau, phan cau, than cap
va dang » van dang, va nang, va lang

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 xanh) or (hieu nganh)) - hanh trinh va dang cong sang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu nganh)) - hanh trinh va dang cong sang than cau*.