Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh tung » thanh cong
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
cua trong » cua truong, cua trung, qua trong
tung cua » trung cua, tuong cua, dung cua
than cap » khan cap, thanh lap, thanh cac
phan cau » phan dau, phan cac, phan tu

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 - thanh tung cua trong cong thanh ((than cap) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - thanh tung cua trong cong thanh ((than cap) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - thanh tung cua trong cong thanh ((than cap) or (phan cau))*.