Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
ban hang » ngan hang
hieu cac » hieu luc, hieu va, hieu van
cac chat » cao chat, cac thuat, cac nha
chat xuc » chat huu, cam xuc, chao xu
cua tre » cua te, cuu tre, cua triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky dang ma hoa. hieu cac chat xuc ((va hanh) or (ban hang)) vi ((cua tre) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang ma hoa. hieu cac chat xuc ((va hanh) OR (ban hang)) vi ((cua tre) OR (cau triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang ma hoa. hieu cac chat xuc ((va hanh) or (ban hang)) vi ((cua tre) or (cau triet))*.