Perhaps you should try some spelling variations:
gia doanh » gia thanh, gia dinh, giai doan
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, tu cach
te sach » toc sach
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
tai cau » tai cac, tai cao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang x hoi. hieu ve ((cam duc) or (pham duc)) gia doanh tai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang x hoi. hieu ve ((cam duc) OR (pham duc)) gia doanh tai cau tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang x hoi. hieu ve ((cam duc) or (pham duc)) gia doanh tai cau tren*.