Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
danh ki » danh di, danh kien, danh gia
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
ki su » ky su

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 ky nang xa hoi. hieu ve cam xuc va danh ki su triet~.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. hieu ve cam xuc va danh ki su triet*.