Perhaps you should try some spelling variations:
canh tac » canh tay, canh giac, anh ta
tac dong » tac dung, tac trong, ha dong
dong hoc » dong co, dong luc
hien nay » hien dai
cong tac » cong ty
tac nang » tac vang, tai nang, tap nang
nang hoc » nang doc, nang luc, hang hoa
hoc vat » hoc va, hoc viet, thuc vat
dan hoc » van hoc, dan toc, dai hoc
cao dan » cao dang, cao danh, cac dan
dao hoc » dai hoc, day hoc, cao hoc
vat nam » viet nam, hoat nam
hang ca » hang va, hang tai, hang dau
vi nam » voi nam, va nam, viet nam
ii nam » i nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( canh tac dong hoc hien nay ) or ( cong tac nang hoc hien nay ))) or ((( hang ca dao hoc ((vi nam) OR (ii nam)) ) or ( nang cao dan hoc vat nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( canh tac dong hoc hien nay ) OR ( cong tac nang hoc hien nay ))) OR ((( hang ca dao hoc ((vi nam) OR (ii nam)) ) OR ( nang cao dan hoc vat nam )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( canh tac dong hoc hien nay ) or ( cong tac nang hoc hien nay ))) or ((( hang ca dao hoc ((vi nam) OR (ii nam)) ) or ( nang cao dan hoc vat nam ))))".
• Adding a wildcard symbol may retrieve word variants: (((( canh tac dong hoc hien nay ) or ( cong tac nang hoc hien nay ))) or ((( hang ca dao hoc ((vi nam) OR (ii nam)) ) or ( nang cao dan hoc vat nam ))))*.