Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dang khai » dang khoi, dang hai, quang khai
van sach » ban sach, van hach, mang sach
khai cua » thai cua, hai cua, khi cua
sach ky » sac ky, sach y, sach ty
duoc va » nuoc va, duc va, duoc ma
va dang » van dang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
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: thuat sach ky nang x hoi. thi ((van sach) OR (ngan sach)) duoc va dang khai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang x hoi. thi ((van sach) OR (ngan sach)) duoc va dang khai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang x hoi. thi ((van sach) OR (ngan sach)) duoc va dang khai cua tre*.