Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thanh vai » thanh hai, thanh van, thanh oai
cau tren » cu tren, dau tren, ca tren
cham cuu » cap cuu, chat cua
su sach » vu sach
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ty tang » tay tang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
va cham » va chat, va tham
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) OR (thanh tai)) 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) OR (thanh tai)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ty tang xa hoi. hieu va cham cuu va ((thanh vai) OR (thanh tai)) 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) OR (thanh tai)) cau tren*.