Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
van cam » van nam, van lam, van cau
vai cua » dai cua, hai cua, lai cua
su sach » so sach, vu sach
nang co » nang cao, nang doc, nang noi
xuc van » duc van, luc van, vuc van
nang o » nang ho, nang ro, nang x
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (su sach)) ky ((nang o) OR (nang co)) hoi. hieu van cam xuc van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (su sach)) ky ((nang o) OR (nang co)) hoi. hieu van cam xuc van hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (su sach)) ky ((nang o) OR (nang co)) hoi. hieu van cam xuc van hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (su sach)) ky ((nang o) OR (nang co)) hoi. hieu van cam xuc van hanh vai cua te*.