Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
anh quang » anh xquang, anh quan, nhanh quang
dang cong » dung cong
anh mang » hanh mang, anh bang, anh dang
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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