Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh tran » hanh trang, thanh tran, hanh tram
tran van » luan van
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
ho lieu » so lieu, co lieu, ho kieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho lieu tinh - hanh tran van ((nhung cong) or (thong thong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - hanh tran van ((nhung cong) OR (thong thong)) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh tran van ((nhung cong) or (thong thong)) dan toan cao*.