Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
doi lieu » duoc lieu, doi chieu, du lieu
trinh va » trinh van, trinh vat, trinh ve
tran van » luan van
cong san » cong tac
san phan » san pham, van phan, sat phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi lieu tinh - lan ((trinh va) OR (tran van)) nhung cong san phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi lieu tinh - lan ((trinh va) OR (tran van)) nhung cong san phan dau".
• Adding a wildcard symbol may retrieve word variants: doi lieu tinh - lan ((trinh va) OR (tran van)) nhung cong san phan dau*.