Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
cau treo » cau theo, cau tren, cau triet
thanh va » thanh van, hanh va, thanh ha
cham luc » cham soc, nhan luc, cham cuu
dang xay » dang van, van xay
dat tren » dat trong, dua tren
va cham » va chat, va tham
luc van » luoc van, luu van, duc van
lang xa » lang ha, lang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((lang xa) OR (dang xay)) hoi. lieu va cham luc van thanh va ((cau treo) or (dat tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((lang xa) OR (dang xay)) hoi. lieu va cham luc van thanh va ((cau treo) OR (dat tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((lang xa) OR (dang xay)) hoi. lieu va cham luc van thanh va ((cau treo) or (dat tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((lang xa) OR (dang xay)) hoi. lieu va cham luc van thanh va ((cau treo) or (dat tren))*.