Perhaps you should try some spelling variations:
dinh toai » dinh toi, dinh tai, tinh toan
toc sach » hoc sach, doc sach, thuoc sach
cham duc » pham duc, cham soc, pham duy
dinh thi » dinh tri
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((y lang) OR (_ lang)) xa hoi. hieu vu cham duc van ((dinh thi) or (dinh toai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y lang) OR (_ lang)) xa hoi. hieu vu cham duc van ((dinh thi) OR (dinh toai)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y lang) OR (_ lang)) xa hoi. hieu vu cham duc van ((dinh thi) or (dinh toai)) cuu tre*".