Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
trung va » truong va, trang va, trung ha
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cua tuc » cua duc, cua thuoc, luat tuc
ve cau » ke cau, va cau, ve cac
cua tu » cua su, cua cu, cua te

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 tay lang xa hoi. hieu ve cau ((thuc va) or (trung va)) hanh vi ((cua tu) OR (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tay lang xa hoi. hieu ve cau ((thuc va) OR (trung va)) hanh vi ((cua tu) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tay lang xa hoi. hieu ve cau ((thuc va) or (trung va)) hanh vi ((cua tu) OR (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: tu sach tay lang xa hoi. hieu ve cau ((thuc va) or (trung va)) hanh vi ((cua tu) OR (cua tuc))*.