Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
thong dan » thong van, tuong dan, thong den
chi xanh » chi anh, chi danh, chi hanh
va thong » va thuong, va phuong, he thong
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - ((hanh trinh) or (canh tranh)) va thong thong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((hanh trinh) OR (canh tranh)) va thong thong dan than cau.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((hanh trinh) or (canh tranh)) va thong thong dan than cau*.