Perhaps you should try some spelling variations:
hoc tieng » hoc hien
tieng han » tieng anh
thuc tien » thuc hien
giang van » hoang van, dang van, gian dan
canh giac » danh gia, anh giao, canh tac
gian van » gian dan, gian lan, gian lang
thu mien » thuc mien, thu hien, thu dien
giac van » giay van, giai van, giac quan
mien nam » vien nam, viet nam, hien nay
hoc mien » hoc hien, hoc vien, ho mien
tien nam » tien lam, vien nam, teen nam
van hoc » van hoa
tac van » tac vang, cac van, tac can
tac va » tac da, tac xa, tuc va

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 van) OR (tac va)) hoc mien nam ) or ((( canh giac van hoc tieng han ) or ((( canh giac van thu mien nam ) or ( canh ((gian van) or (giang van)) thuc tien nam ))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( canh ((tac van) OR (tac va)) hoc mien nam ) OR ((( canh giac van hoc tieng han ) OR ((( canh giac van thu mien nam ) OR ( canh ((gian van) OR (giang van)) thuc tien nam ))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( canh ((tac van) OR (tac va)) hoc mien nam ) or ((( canh giac van hoc tieng han ) or ((( canh giac van thu mien nam ) or ( canh ((gian van) or (giang van)) thuc tien nam ))))))*".