Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tu sach » thu sach, su sach, te sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
hieu va » hieu qua
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
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: ((tu sach) or (toc sach)) ky dang xa hoi. ((hieu va) or (lieu va)) cam xuc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky dang xa hoi. ((hieu va) OR (lieu va)) cam xuc va danh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky dang xa hoi. ((hieu va) or (lieu va)) cam xuc va danh vi cua te*.