Perhaps you should try some spelling variations:
qua tham » qua cham, qua than, qua thanh
doc sach » hoc sach, toc sach, nuoc sach
tham tuc » tham thuc, thai tuc, nham thuc
hang vi » hanh vi, hang di, khang voi
te sach » toc sach
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
tuc va » thuc va, truc va, tuc xa
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: ((te sach) or (doc sach)) ty lang xa hoi. hieu qua tham tuc va ((hang vi) OR (hang va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) ty lang xa hoi. hieu qua tham tuc va ((hang vi) OR (hang va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) ty lang xa hoi. hieu qua tham tuc va ((hang vi) OR (hang va)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) ty lang xa hoi. hieu qua tham tuc va ((hang vi) OR (hang va)) cua te*.