Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach hoi » sach doi, sach moi, cach thoi
hoi nang » hoi lang, ho nang, hoa nang
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
va hanh » va thanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua
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: thu sach hoi nang x hoi. hieu ve cam xuc ((((va hanh) OR (van hanh))) or (va dan)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoi nang x hoi. hieu ve cam xuc ((((va hanh) OR (van hanh))) OR (va dan)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoi nang x hoi. hieu ve cam xuc ((((va hanh) OR (van hanh))) or (va dan)) vi cua tre*".