Perhaps you should try some spelling variations:
canh tac » canh tay, canh giac, cong tac
danh tuc » danh thuc, danh tu, danh muc
hoc viet » hoc hien
cac van » cac dan
tac han » tac nhan, tac can, tac van
tac ha » bac ha, tac da, tac xa
xa hoc » xa hoi, va hoc, xa hoa
ha hoc » hoa hoc, nha hoc, va hoc

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) or (doanh tai)) ha hoc viet nam ) or ( danh ((((tac han) OR (tac ha))) or (cac van)) hoc viet nam ))) or ( danh tuc xa hoc viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( ((canh tac) OR (doanh tai)) ha hoc viet nam ) OR ( danh ((((tac han) OR (tac ha))) OR (cac van)) hoc viet nam ))) OR ( danh tuc xa hoc viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( ((canh tac) or (doanh tai)) ha hoc viet nam ) or ( danh ((((tac han) OR (tac ha))) or (cac van)) hoc viet nam ))) or ( danh tuc xa hoc viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (((( ((canh tac) or (doanh tai)) ha hoc viet nam ) or ( danh ((((tac han) OR (tac ha))) or (cac van)) hoc viet nam ))) or ( danh tuc xa hoc viet nam ))*.