Perhaps you should try some spelling variations:
hoc phien » hoc hien, thuoc phien, hoc nghien
phien hai » phien tai, phien ban, thiet hai
doanh bac » doanh bat, doanh ban, danh bac
danh tac » canh tac, danh bac, doanh tai
hoc vien » hoc hien, hoc viet, hoc tieng
vien nam » viet nam, vien dai, van nam
hoc mien » hoc hien, ho mien, hoc lien
mien nam » viet nam, hien nay, mien nui
tac va » tac da, tac xa, tuc va
va hoc » van hoc
bac xa » tac xa, buc xa, bac a
xa hoc » xa hoi, xa hoa, ta hoc
ha hoc » hoa hoc, nha hoc, ha hoa

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 va hoc vien nam ) or ( danh tac va hoc phien hai ))) or ((( doanh bac xa hoc mien nam ) OR ( doanh bac ha hoc mien nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( danh tac va hoc vien nam ) OR ( danh tac va hoc phien hai ))) OR ((( doanh bac xa hoc mien nam ) OR ( doanh bac ha hoc mien nam )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( danh tac va hoc vien nam ) or ( danh tac va hoc phien hai ))) or ((( doanh bac xa hoc mien nam ) OR ( doanh bac ha hoc mien nam ))))".
• Adding a wildcard symbol may retrieve word variants: (((( danh tac va hoc vien nam ) or ( danh tac va hoc phien hai ))) or ((( doanh bac xa hoc mien nam ) OR ( doanh bac ha hoc mien nam ))))*.