Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cham cuu » cap cuu, chat cua
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
su sach » vu sach
so sach » so sanh, bo sach, co sach
ty tang » tay tang, ty xang, ty hang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
va cham » va chat, va tham
vai cau » va cau, van cau, vai cac
cuu va » cuu van, cuu ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ty tang xa hoi. hieu va cham cuu va thanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty tang xa hoi. hieu va cham cuu va thanh vai cau tren.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty tang xa hoi. hieu va cham cuu va thanh vai cau tren*.