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

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 quan - hanh ((tang va) or (dang van)) nang cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu quan - hanh ((tang va) OR (dang van)) nang cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho lieu quan - hanh ((tang va) or (dang van)) nang cong dan toan cao*.