Perhaps you should try some spelling variations:
nang cong » nang song, dang cong, bang cong
tang van » dang van, hoang van, trong van
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
ho lieu » co lieu, ho kieu, ho chieu
so lieu » so dieu
tang va » trang va, thang va, tang vat

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)) quan - hanh ((tang va) or (tang van)) nang cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho lieu) OR (so lieu)) quan - hanh ((tang va) OR (tang van)) nang cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho lieu) OR (so lieu)) quan - hanh ((tang va) or (tang van)) nang cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho lieu) OR (so lieu)) quan - hanh ((tang va) or (tang van)) nang cong dan toan cao*.