Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
nang ma » tang ma, sang ma, nang cao
hieu ha » hieu hoa, hieu va, hieu ca
xa danh » dia danh, nam danh, van danh
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang ma hoa. hieu ha nam thu ((xa danh) or (va danh)) hai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ma hoa. hieu ha nam thu ((xa danh) OR (va danh)) hai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ma hoa. hieu ha nam thu ((xa danh) or (va danh)) hai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ma hoa. hieu ha nam thu ((xa danh) or (va danh)) hai ((cua tre) OR (cua triet))*.