Perhaps you should try some spelling variations:
dinh tai » dinh toai, dinh tri, dinh thi
te sach » toc sach
ky sang » ky dang, ky tang, duy sang
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
va dinh » van dinh, va kinh, va tinh
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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 ((ky sang) or (ky nang)) xa hoi. hieu va pham duc va dinh tai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky sang) OR (ky nang)) xa hoi. hieu va pham duc va dinh tai ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky sang) or (ky nang)) xa hoi. hieu va pham duc va dinh tai ((cua tre) OR (cua te))*".