Perhaps you should try some spelling variations:
sang tai » hang tai, sang tao, tang tai
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
cua nuoc » cua quoc, cua nguoi, cua thuoc
tu sach » su sach, te sach, tu cach
ky sang » ky nang, ky dang, ky tang
tai hoi » tai khoi, dai hoi, tai hai
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua

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