Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, hang cong
cong quang » luong quang, thong quang, duong quang
hoc thieu » toc thieu, hoc hien
can tranh » van ranh, co tranh
hoc nhung » hoa nhung, hon nhung, nuoc nhung
quang tan » quang tuan, quang tran, quang toan
tan tap » toan tap, han tap, tan tat

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 xanh - ((canh tranh) or (((can tranh) OR (tan tran)))) hoc nhung cong quang tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((canh tranh) OR (((can tranh) OR (tan tran)))) hoc nhung cong quang tan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((canh tranh) or (((can tranh) OR (tan tran)))) hoc nhung cong quang tan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh tranh) or (((can tranh) OR (tan tran)))) hoc nhung cong quang tan tap*.