Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
dao tuc » dao duc
va phan » van phan, va phat, va phap
cuc tre » duc tre, cua tre, cuu tre
y lang » o lang, _ lang, tay lang
va han » van han, va hanh, va hang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. ((hieu va) OR (hieu qua)) dao tuc ((va han) OR (va phan)) tai cuc tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. ((hieu va) or (hieu qua)) dao tuc ((va han) OR (va phan)) tai cuc tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. ((hieu va) or (hieu qua)) dao tuc ((va han) OR (va phan)) tai cuc tre*.