Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thanh hung » thanh huong, thanh tung, thanh trung
tran phung » tran phuong, trang phung, tran hung
tran hong » tran hoang, tran trong, tranh hang
cong nang » cong ngang, cong lang, cong nong
nang hang » nang sang, hang hang, cang thang
hang dau » hang va, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) OR (chieu sach)) - thanh hung ((tran phung) or (tran hong)) cong nang hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu sach)) - thanh hung ((tran phung) OR (tran hong)) cong nang hang dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu sach)) - thanh hung ((tran phung) or (tran hong)) cong nang hang dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu sach)) - thanh hung ((tran phung) or (tran hong)) cong nang hang dau*.