Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
tay hoi » tay ho, tao hoi, tay thai
xuc van » duc van, luc van, xuc ban
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
may hoi » may thoi, mai hoi, may hmi
ky mang » ky nang, ke mang, ky dang
so sach » so sanh, bo sach, co sach
ve cam » ve cham, ve cac, va cam
vi cuu » vi luu, vinh cuu

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 (so sach)) ky mang ((may hoi) or (tay hoi)). hieu ve cam xuc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ky mang ((may hoi) OR (tay hoi)). hieu ve cam xuc van hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ky mang ((may hoi) or (tay hoi)). hieu ve cam xuc van hanh vi cuu tre*.