Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh phan » thanh san, thanh toan, thanh hai
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cong benh » con benh, cong binh, song benh
hanh han » hanh nhan, hanh phan, hanh san
va thong » va thuong, va phuong, he thong
nhan tai » hang tai, van tai, toan tai

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 - ((hanh han) or (((thanh phan) OR (thanh pho)))) va thong cong benh nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - ((hanh han) OR (((thanh phan) OR (thanh pho)))) va thong cong benh nhan tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - ((hanh han) or (((thanh phan) OR (thanh pho)))) va thong cong benh nhan tai".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - ((hanh han) or (((thanh phan) OR (thanh pho)))) va thong cong benh nhan tai*.