Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
ngay luc » nhan luc, nay lua, ngay doc
cuu tre » cua tre, cau treo
sach ty » sach y, sach tu, sach thu
so sach » so sanh, bo sach, co sach
lang ha » long ha
ty lang » tay lang, ty xang, ty hang
ha hoi » hoa hoi, ha noi, xa hoi
ca dan » cac dan, ca dao
dan vi » doan vi, don vi, dan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty lang ha hoi. lieu va ((ngay luc) or (ngap lut)) ca dan vi ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty lang ha hoi. lieu va ((ngay luc) OR (ngap lut)) ca dan vi ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty lang ha hoi. lieu va ((ngay luc) or (ngap lut)) ca dan vi ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: so sach ty lang ha hoi. lieu va ((ngay luc) or (ngap lut)) ca dan vi ((cuu tre) OR (cau tren))*.