Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
tran thuat » trong thuat, trien thuat, tran tuan
thuat bang » thuat ban, thuat mang, thuat nang
hieu xanh » chieu xanh, hieu manh, hieu nganh
manh tran » manh toan, manh tuan, canh tranh
bang cong » dang cong, bang song, hang cong
cong dang » cong dong, cong dan, cong dung
dang hanh » dang thanh, ban hanh, dang van
hanh hai » thanh hai, nhanh hai, hang hai

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 (chieu sang)) - manh tran thuat bang cong dang hanh hai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu sang)) - manh tran thuat bang cong dang hanh hai*.