Perhaps you should try some spelling variations:
hoc phien » hoc hien, thuoc phien, hoc nghien
nhanh cao » nhanh cau, nhanh lao, nha cao
nhanh cay » nhanh ha, nhanh bac, nhanh va
danh tac » canh tac, danh bac, doanh tai
hoc vien » hoc hien, hoc tieng, hoc vi
hoc viet » hoc hien
tac vang » tac dung, tac dong
vien dai » hien dai
viet dai » viet da, viet dao, viet dat
vang hoc » nang hoc, vung hoc, bang hoc
danh cac » dinh cac, danh ca, hanh cac
van hoc » van hoa
cac van » cac dan
cay van » can van, cay dan, may van
dan hoc » dan toc, toan hoc, dong hoc
cao van » dao van, cao dang, cao tang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( danh tac vang hoc phien ban ) OR ((( danh cac van hoc vien dai ) OR ((((( nhanh cay van hoc vien dai ) OR ( nhanh cay ((dan hoc) OR (dai hoc)) vien dai ))) OR ( nhanh cao van hoc viet dai ))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( danh tac vang hoc phien ban ) or ((( danh cac van hoc vien dai ) or ((((( nhanh cay van hoc vien dai ) or ( nhanh cay ((dan hoc) OR (dai hoc)) vien dai ))) or ( nhanh cao van hoc viet dai ))))))~".
• Adding a wildcard symbol may retrieve word variants: (( danh tac vang hoc phien ban ) or ((( danh cac van hoc vien dai ) or ((((( nhanh cay van hoc vien dai ) or ( nhanh cay ((dan hoc) OR (dai hoc)) vien dai ))) or ( nhanh cao van hoc viet dai ))))))*.