Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
dang bai » dung bai, dang hai, dang ba
tu sach » thu sach, su sach, tu cach
hai cuc » tai cuc, hai cua, thai cua
hieu ve » hieu va, hieu van
cuc tre » duc tre, cua tre, cuu tre
bai hoi » bai choi, bai hoc, dai hoi
ky dang » ky nang, ky danh
te sach » toc sach
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
ve cau » ke cau, va cau, ve cac

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) OR (te sach)) ky dang bai hoi. hieu ve cau ((luc va) or (tuc va)) thanh hai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky dang bai hoi. hieu ve cau ((luc va) OR (tuc va)) thanh hai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky dang bai hoi. hieu ve cau ((luc va) or (tuc va)) thanh hai cuc tre*".