Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thang long » thanh cong
trinh vat » trinh van, trinh luat, sinh vat
hang cong » dang cong, hang nong, bang cong
chi xanh » chi anh, chi danh, chi hanh
doi chi » doi khi
san tai » sang tai, han tai, ban tai
van tai » von tai, van tuan

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 vat ((hang cong) or (thang long)) ((san tai) OR (van tai)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - hanh trinh vat ((hang cong) OR (thang long)) ((san tai) OR (van tai)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - hanh trinh vat ((hang cong) or (thang long)) ((san tai) OR (van tai)) cao".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh trinh vat ((hang cong) or (thang long)) ((san tai) OR (van tai)) cao*.