Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dinh tri » chinh tri
van dinh » van minh, van dich, va dinh
tham loc » tham nuoc, cham soc, hau loc
tri cuu » tri cua, tra cuu, trinh cuu
loc van » luoc van, hoc van, lo van
va tham » van tham, va cham, va thanh
cuu tre » cua tre, cau tren, cau treo
_ sang » _ san
y sang » duy sang
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ((y sang) OR (_ sang)) ma hoi. lieu va tham loc van dinh tri cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((y sang) OR (_ sang)) ma hoi. lieu va tham loc van dinh tri cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ((y sang) OR (_ sang)) ma hoi. lieu va tham loc van dinh tri cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ((y sang) OR (_ sang)) ma hoi. lieu va tham loc van dinh tri cuu tre*.