Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
sach ky » sac ky, sach y, sach ty
va hanh » va thanh, va danh, ban hanh
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa

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 tang ma hoi. hieu va chat xuc ((va hanh) or (van hanh)) vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ma hoi. hieu va chat xuc ((va hanh) OR (van hanh)) vi ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ma hoi. hieu va chat xuc ((va hanh) or (van hanh)) vi ((cua tre) OR (cua triet))*".