Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
lieu tinh » trieu tinh, diep tinh, bien tinh
trang va » hang va
tran van » luan van
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban
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 ((trang va) OR (tran van)) phuong cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - hanh ((trang va) OR (tran van)) phuong cong dan ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - hanh ((trang va) OR (tran van)) phuong cong dan ((toan cao) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh ((trang va) OR (tran van)) phuong cong dan ((toan cao) or (toan tap))*.