Perhaps you should try some spelling variations:
sach thai » sach tham, sac thai, sach tai
thai bang » thai trang, thai binh, tai ban
hanh ham » hanh cham, hanh lam, hanh nam
te sach » toc sach
va hanh » van hanh, va thanh, va danh
so tien » so tin, su tien, so bien
dai hoi » dai hoc, dai hai, dai moi
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa
ham so » nam so, cham soc
ve cai » va cai, ve tai, ve cau

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)) xuc va hanh ham 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)) xuc va hanh ham 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)) xuc va hanh ham so tien*.