Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
lieu tinh » trieu tinh, diep tinh, bien tinh
tang luan » dung luan
doc lieu » duoc lieu, doc hieu, du lieu
cong van » cong vang, song van, cong tan
cong san » cong tac
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc lieu tinh - hanh ((tang luan) or (truong thanh)) dung ((cong van) OR (cong san)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc lieu tinh - hanh ((tang luan) OR (truong thanh)) dung ((cong van) OR (cong san)) tuan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc lieu tinh - hanh ((tang luan) or (truong thanh)) dung ((cong van) OR (cong san)) tuan cau*".