Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua pham » quan pham, quy pham, qua cham
tan banh » ban banh, tang binh, phan banh
tan binh » tran binh, tang binh, van binh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, dua tren
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: tu sach ty nang x hoi. hieu qua pham duc ((tan banh) or (tan binh)) d ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu qua pham duc ((tan banh) OR (tan binh)) d ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu qua pham duc ((tan banh) or (tan binh)) d ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu qua pham duc ((tan banh) or (tan binh)) d ((cua tre) OR (cua triet))*.