Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
cham luc » nhan luc, cham cuu, chat lua
su sach » vu sach
vai cuu » vai cua
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
cuu tre » cua tre, cau tren, cau treo

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 luc) OR (cham soc)) va thanh vai cuu tre~.
• 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 luc) OR (cham soc)) va thanh vai cuu tre.
• 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 luc) OR (cham soc)) va thanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty tang xa hoi. hieu va ((cham luc) OR (cham soc)) va thanh vai cuu tre*.