Perhaps you should try some spelling variations:
dang xay » dang van, van xay
lang tai » lang thai, hang tai, tang tai
tu sach » thu sach, su sach, te sach
lang xa » lang ha, lang van
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
va lang » va nang, hoa lang
luc va » duc va, tuc va, loc va
cuc te » cua te, cuc thue, cuc tieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((lang xa) or (dang xay)) hoi. hieu va cac luc va lang tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((lang xa) OR (dang xay)) hoi. hieu va cac luc va lang tai cuc te.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((lang xa) or (dang xay)) hoi. hieu va cac luc va lang tai cuc te*.