Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
danh vai » danh sai, danh va, doanh van
sach tru » sach truc, sach thu, sach tu
lang xa » lang ha, lang van
qua cao » qua cac, qua ca, qua cai
vai cua » dai cua, hai cua, lai cua
suc va » tuc va, luc va, soc va
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: toc sach tru ((lang xa) or (dang xay)) hoi. hieu qua cao ((suc va) OR (duc va)) danh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tru ((lang xa) OR (dang xay)) hoi. hieu qua cao ((suc va) OR (duc va)) danh vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tru ((lang xa) or (dang xay)) hoi. hieu qua cao ((suc va) OR (duc va)) danh vai cua te*".