Perhaps you should try some spelling variations:
thoi hien » thi hien, thoi mien, thuc hien
danh thuc » dan thuc, anh thuc, dinh thuc
hoi phien » hoi phieu, thai phien, hoi phan
phien nam » hien nay, phien ban, vien nam
danh tac » danh bac, doanh tai, danh tu
hien nam » hien nay, vien nam, mien nam
canh tac » canh tay, canh giac, cong tac
thuc da » thuc dan, thuc day, thuc dia
xa thoi » xa khoi, xa thai, cac thoi
tac xa » tuc xa
xa hoc » va hoc, xa hoa, ta hoc
da hoc » dai hoc, dan hoc, day hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( danh tac xa hoc viet nam ) or ((((( danh tac da hoc hien nam ) OR ( danh thuc da hoc hien nam ))) or ((( canh tac xa thoi hien nam ) or ( danh tac xa hoi phien nam ))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( danh tac xa hoc viet nam ) OR ((((( danh tac da hoc hien nam ) OR ( danh thuc da hoc hien nam ))) OR ((( canh tac xa thoi hien nam ) OR ( danh tac xa hoi phien nam )))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( danh tac xa hoc viet nam ) or ((((( danh tac da hoc hien nam ) OR ( danh thuc da hoc hien nam ))) or ((( canh tac xa thoi hien nam ) or ( danh tac xa hoi phien nam ))))))".
• Adding a wildcard symbol may retrieve word variants: (( danh tac xa hoc viet nam ) or ((((( danh tac da hoc hien nam ) OR ( danh thuc da hoc hien nam ))) or ((( canh tac xa thoi hien nam ) or ( danh tac xa hoi phien nam ))))))*.