Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
nang xa » nang x, nang ma, mang xa
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
lang xa » lang ha, dang xay, lang van
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) or (tu sach)) ky ((nang xa) or (lang xa)) hoi. hieu ve cam xuc va danh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (tu sach)) ky ((nang xa) OR (lang xa)) hoi. hieu ve cam xuc va danh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (tu sach)) ky ((nang xa) or (lang xa)) hoi. hieu ve cam xuc va danh vi cua viet*.