Perhaps you should try some spelling variations:
sach thai » sach tham, sac thai, sach tai
thai bang » thai trang, thai binh, tai ban
xanh lam » hanh lam, dinh lam, xanh a
te sach » toc sach
va xanh » va danh, va hanh, va anh
dai hoi » dai hoc, dai hai, dai moi
so tien » so tin, su tien, so bien
ve cai » va cai, ve tai, ve cau
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa
lam so » lam son, nam so, ham so

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 thai bang ((ma hoi) or (dai hoi)). hieu ((ve cai) or (ve cac)) duc va xanh lam so tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thai bang ((ma hoi) OR (dai hoi)). hieu ((ve cai) OR (ve cac)) duc va xanh lam so tien.
• Adding a wildcard symbol may retrieve word variants: te sach thai bang ((ma hoi) or (dai hoi)). hieu ((ve cai) or (ve cac)) duc va xanh lam so tien*.