Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
thanh vi » hanh vi, thanh va, thanh ve
toc sach » hoc sach, doc sach, thuoc sach
duy gian » dan gian, don gian, duy van
duc gian » duc gia, duc giao, duoc giao
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
ve pham » vi pham, v pham, ve phan
vi cau » va cau, ve cau, di cau

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 (toc sach)) ty lang xa hoi. hieu ve pham ((duc gian) OR (duy gian)) thanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty lang xa hoi. hieu ve pham ((duc gian) OR (duy gian)) thanh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ty lang xa hoi. hieu ve pham ((duc gian) OR (duy gian)) thanh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ty lang xa hoi. hieu ve pham ((duc gian) OR (duy gian)) thanh vi cau treo*.