Perhaps you should try some spelling variations:
quang cao » nang cao, quang nam
dung cong » dung trong
cau nhanh » cau nganh, cach nhanh, chi nhanh
nhanh cau » nhanh cay, thanh chau, nhanh ha
chi xanh » chi anh, chi danh, chi hanh
nung cao » nang cao, nhung cau, luong cao
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 - thanh ((nung cao) OR (quang cao)) ((dang cong) or (dung cong)) cau nhanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - thanh ((nung cao) OR (quang cao)) ((dang cong) OR (dung cong)) cau nhanh cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - thanh ((nung cao) OR (quang cao)) ((dang cong) or (dung cong)) cau nhanh cau*".