Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
tham sac » pham sach, cham soc, pham san
cau tren » cu tren, dau tren, ca tren
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
va tham » van tham, va cham, va thanh
van anh » van thanh, van minh
vi cau » va cau, ve cau, di cau
tuan » quan, tran, luan

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) or (thuoc sach)) ty lang xa hoi. lieu va tham sac ((van anh) OR (tuan anh)) vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ty lang xa hoi. lieu va tham sac ((van anh) OR (tuan anh)) vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuoc sach)) ty lang xa hoi. lieu va tham sac ((van anh) OR (tuan anh)) vi cau tren".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) ty lang xa hoi. lieu va tham sac ((van anh) OR (tuan anh)) vi cau tren*.