Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh, hanh chinh
hang cong » dang cong, hang nong, bang cong
trinh va » trinh van, trinh vat, trinh ve
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan
va hang » van hang, 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 (chieu tinh)) - hanh trinh va hang cong ((dan than) OR (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu tinh)) - hanh trinh va hang cong ((dan than) OR (van than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu tinh)) - hanh trinh va hang cong ((dan than) OR (van than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu tinh)) - hanh trinh va hang cong ((dan than) OR (van than)) cau*.