Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
tnhan sinh » thai sinh, nha sinh, nhan dinh
quang cong » quang cuong, quang dong, quang hoang
cong luong » cong thuong, nang luong, cong dong
luong dan » huong dan, luong dao, luong van
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - ((nhan sinh) or (tnhan sinh)) quang cong luong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - ((nhan sinh) OR (tnhan sinh)) quang cong luong dan than tap*.