Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tinh vai » tinh va, tinh hai, tinh bai
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
va tinh » may tinh
vai cau » va cau, van cau, vai cac
va cam » va cham, va cao, va cai
o va » do va, so va, co va

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 ty lang xa hoi. hieu ((va cam) or (va cac)) o va tinh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty lang xa hoi. hieu ((va cam) OR (va cac)) o va tinh vai cau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ty lang xa hoi. hieu ((va cam) or (va cac)) o va tinh vai cau tren*.