Perhaps you should try some spelling variations:
thanh huong » thanh hung, thanh cong, anh huong
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
huong cua » dung cua
cua nhung » va nhung
cuong tap » luong tap, cong tac, cong tan
luong tai » dung tai, luong va
toan cao » toan ban, toan tap

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 huong cua nhung ((cuong tap) OR (luong tai)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu sach)) - thanh huong cua nhung ((cuong tap) OR (luong tai)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (chieu sach)) - thanh huong cua nhung ((cuong tap) OR (luong tai)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (chieu sach)) - thanh huong cua nhung ((cuong tap) OR (luong tai)) toan cao*.