Perhaps you should try some spelling variations:
luong thanh » muong thanh, truong thanh, dong thanh
chieu sang » chieu sach, chieu xanh, hieu lang
dung luong » dung thuong, dung phuong, dung truong
thanh phan » thanh pho, thanh san, thanh toan
hoc chieu » hoc thieu, ho chieu, hoc hien
toan thuc » toan hoc
nhan thuc » nhan luc
dan thuc » dan toc, am thuc
phan cac » nhan cach, phan dau, phan lap

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 - tinh ((toan thuc) or (((nhan thuc) OR (dan thuc)))) dung luong thanh phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - tinh ((toan thuc) OR (((nhan thuc) OR (dan thuc)))) dung luong thanh phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - tinh ((toan thuc) or (((nhan thuc) OR (dan thuc)))) dung luong thanh phan cac".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - tinh ((toan thuc) or (((nhan thuc) OR (dan thuc)))) dung luong thanh phan cac*.