Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
nhung dung » phuong dung, ung dung, thong dung
hoc thieu » toc thieu, hoc hien
dung manh » duong manh, dung danh, hung manh
manh toan » thanh toan, anh tuan, tinh toan
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
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 thieu sang - thanh ((trung va) OR (trung ha)) nhung dung manh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh ((trung va) OR (trung ha)) nhung dung manh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((trung va) OR (trung ha)) nhung dung manh toan cau*.