Perhaps you should try some spelling variations:
thanh nhanh » thanh nhan, thanh thanh, thanh phan
hanh trinh » canh tranh, hanh chinh
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
hieu sang » chieu sang, hieu lang, hieu quang
cua nhung » va nhung
nhanh cau » nhanh cay, thanh chau, nhanh ha
doc hieu » toc thieu, hoc thieu, hoc hien

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 sang - ((hanh trung) or (hanh trinh)) cua nhung cong thanh nhanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - ((hanh trung) OR (hanh trinh)) cua nhung cong thanh nhanh cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - ((hanh trung) or (hanh trinh)) cua nhung cong thanh nhanh cau*.