Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
chat truc » cau truc, chat xuc
thien van » thi van
van dinh » van minh, van dich, xuan dinh
van chat » cao chat
sach ky » sac ky, sach y, sach ty
va dinh » va kinh, va tinh, vu dinh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi
du cua » duy cua, dau cua, dum cua

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 ((ma hoi) or (ma hoa)). thien van chat truc ((va dinh) OR (van dinh)) du cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang ((ma hoi) OR (ma hoa)). thien van chat truc ((va dinh) OR (van dinh)) du cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang ((ma hoi) or (ma hoa)). thien van chat truc ((va dinh) OR (van dinh)) du cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang ((ma hoi) or (ma hoa)). thien van chat truc ((va dinh) OR (van dinh)) du cua tre*.