Perhaps you should try some spelling variations:
quan tinh » quan binh, quang ninh, quang binh
cua triet » cua viet, su triet, va triet
ban tinh » ban thanh, ban hanh, bi tinh
cua tre » cua te, cuu tre, dua tren
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
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) OR (quan tinh)) vai ((cua 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) OR (quan tinh)) vai ((cua 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) OR (quan tinh)) vai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ve cam cuc ((ban tinh) OR (quan tinh)) vai ((cua tre) or (cua triet))*.