Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat huu » pham huu
ban hang » ngan hang
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
va tinh » may tinh
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoa. hieu van chat huu ((va tinh) OR (((ban hanh) OR (ban hang)))) vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ma hoa. hieu van chat huu ((va tinh) or (((ban hanh) OR (ban hang)))) vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoa. hieu van chat huu ((va tinh) or (((ban hanh) OR (ban hang)))) vai cuu tre*.