Perhaps you should try some spelling variations:
thuong thong » thong thong, thuong trong, thuong phuong
cua thuong » cua truong, cua phuong, ca thuong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
manh hung » anh huong
thong tan » thong than, thong tran, thong tin
hung cua » huong cua, chung cua, khung cua
tan toan » tan tran, tap toan, van toan
toan cau » 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 (hieu lang)) - manh hung cua thuong thong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - manh hung cua thuong thong tan toan cau*.