Perhaps you should try some spelling variations:
hang cong » dang cong, hang nong, bang cong
tran van » luan van
trang va » hang va
cong tac » cong ty
tac pham » thuc pham, san pham
pham tap » pham tai, pha tap, phan tap
ho lieu » co lieu, ho kieu, ho chieu
so lieu » so dieu

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) OR (so lieu)) tinh - hanh ((tran van) or (trang va)) hang cong tac pham tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho lieu) OR (so lieu)) tinh - hanh ((tran van) OR (trang va)) hang cong tac pham tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho lieu) OR (so lieu)) tinh - hanh ((tran van) or (trang va)) hang cong tac pham tap*".