Perhaps you should try some spelling variations:
dich hoc » sinh hoc, hinh hoc, tinh hoc
ly lang » ly hang, ly vang, le lang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
cua te » cua tu
bach » sach, cach, bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ly lang xa hoi. ((hieu va) or (hieu qua)) cac tuc van dich hoc cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ly lang xa hoi. ((hieu va) OR (hieu qua)) cac tuc van dich hoc cua te.
• Adding a wildcard symbol may retrieve word variants: vu bach ly lang xa hoi. ((hieu va) or (hieu qua)) cac tuc van dich hoc cua te*.