Perhaps you should try some spelling variations:
dich hoc » sinh hoc, hinh hoc, tinh hoc
pho cong » pho uong, cho cong, pho dong
cong dac » cong tac, cong dan, cong cac
tu dich » te dich, chu dich, hut dich
va nhan » van nhan, ca nhan, va nha
va phan » van phan, va phat, va phap
mo hoc » mon hoc, co hoc
dac xa » tac xa, cac xa, dan xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dich hoc tap, nghien cuu mo hoc pho cong dac xa hoi ((va nhan) OR (va phan)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dich hoc tap, nghien cuu mo hoc pho cong dac xa hoi ((va nhan) OR (va phan)) van".
• Adding a wildcard symbol may retrieve word variants: tu dich hoc tap, nghien cuu mo hoc pho cong dac xa hoi ((va nhan) OR (va phan)) van*.