Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
sinh de » sinh dh, sinh dai
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
ty lang » tay lang, ty xang, ty hang
luc va » tuc va, loc va
de cua » le cua, te cua, dieu cua
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 sach ty lang xa hoi. ((hieu ve) OR (hieu va)) cau ((luc va) OR (duc va)) sinh de cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty lang xa hoi. ((hieu ve) OR (hieu va)) cau ((luc va) OR (duc va)) sinh de cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ty lang xa hoi. ((hieu ve) OR (hieu va)) cau ((luc va) OR (duc va)) sinh de cua te*.