Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tang huong » tang cuong, tang duong, hang thuong
hieu xanh » chieu xanh, hieu manh, hieu nganh
hiem ngan » kim ngan, viem gan
huong ban » huong dan, huong ben, huong lan
trinh ha » trinh han, trinh hoa, trinh nha
than cau » toan cau, phan cau, than cap
phan cac » nhan cach, phan dau, phan lap
ha tang » phap tang, cao tang, kho tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (hiem ngan)) - hanh trinh ha tang huong ban ((than cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hiem ngan)) - hanh trinh ha tang huong ban ((than cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hiem ngan)) - hanh trinh ha tang huong ban ((than cau) or (phan cac))*.