Perhaps you should try some spelling variations:
chap thuong » chan thuong, phan thuong, pham thuong
chieu sang » chieu sach, chieu xanh, hieu lang
cap thong » cap tong, phap thong, chap phong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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: ho chieu sang - ((thanh tung) or (thanh cong)) ((cap thong) OR (chap thuong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((thanh tung) OR (thanh cong)) ((cap thong) OR (chap thuong)) cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((thanh tung) or (thanh cong)) ((cap thong) OR (chap thuong)) cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((thanh tung) or (thanh cong)) ((cap thong) OR (chap thuong)) cong tac toan cau*.