Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
ung dcung » ung dung, dung dung, ung nhung
cung dung » cuong dung, ung dung, cung ung
trinh va » trinh van, trinh vat, trinh ve
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu quang - canh trinh va ((ung dcung) OR (cung dung)) thanh ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - canh trinh va ((ung dcung) OR (cung dung)) thanh ((toan cau) OR (toan tap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - canh trinh va ((ung dcung) OR (cung dung)) thanh ((toan cau) or (toan tap))*".