Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat xuc » chat huu, cam xuc, chao xu
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
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 nang ma hoi. hieu van chat xuc ((va hanh) or (ban hanh)) vai ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu van chat xuc ((va hanh) OR (ban hanh)) vai ((dua tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu van chat xuc ((va hanh) or (ban hanh)) vai ((dua tren) or (cua triet))*.