Perhaps you should try some spelling variations:
hieu ve » hieu van
hieu va » lieu va, hieu qua
sai cua » dai cua, hai cua, lai cua
dan sai » danh sai, doan sai, dan tai
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
cac hoc » cach hoc, cac hop, bac hoc
va dan » ca dan, va dao, va dau
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sach ty)) lang xa hoi. ((hieu ve) or (hieu va)) cac hoc va dan sai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach ty)) lang xa hoi. ((hieu ve) OR (hieu va)) cac hoc va dan sai cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach ty)) lang xa hoi. ((hieu ve) or (hieu va)) cac hoc va dan sai cua te*.