Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh tran » hanh trang, thanh tran, hanh tram
dung cong » dung trong
tay tieng » tap tieng, ta tieng, day tieng
tran van » luan van
tu tieng » luc tieng, tu tuong, tu trong
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 (dung cong)) ((tay tieng) or (tu tieng)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - hanh tran van ((nhung cong) OR (dung cong)) ((tay tieng) OR (tu tieng)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - hanh tran van ((nhung cong) OR (dung cong)) ((tay tieng) or (tu tieng)) tap".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh tran van ((nhung cong) OR (dung cong)) ((tay tieng) or (tu tieng)) tap*.