Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban tinh » ban thanh, quan tinh, ban hanh
tinh vai » tinh va, tinh hai, tinh bai
cuu tre » cau tren, cau treo
cua tre » cua te, dua tren, cua thep
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cam cuc » cam xuc, cham cuu, pham cuc
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
cuc ban » cua ban, cac ban, cuu ban
ve cam » ve cham, ve cac, va cam

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 ky dang xa hoi. hieu ve cam cuc ban tinh vai ((((cua tre) OR (cuu tre))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ve cam cuc ban tinh vai ((((cua tre) OR (cuu tre))) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu ve cam cuc ban tinh vai ((((cua tre) OR (cuu tre))) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ve cam cuc ban tinh vai ((((cua tre) OR (cuu tre))) or (cua triet))*.