Perhaps you should try some spelling variations:
thieu quang » hieu quang, trien quang, hieu quan
thien quan » trien quang, lien quan, thien van
thanh phan » thanh pho, thanh san, thanh toan
thong cong » trong cong, tong cong, thong thong
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) OR (thien quan)) - ((hanh han) or (thanh phan)) va thong cong benh nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu quang) OR (thien quan)) - ((hanh han) OR (thanh phan)) va thong cong benh nhan tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu quang) OR (thien quan)) - ((hanh han) or (thanh phan)) va thong cong benh nhan tai".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu quang) OR (thien quan)) - ((hanh han) or (thanh phan)) va thong cong benh nhan tai*.