Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu ve » hieu va, hieu van
xuc gia » duc gia, tuc gia, quoc gia
luc gia » luoc gia, duc gia, quoc gia
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
ha cuu » cham cuu, khao cuu
ho cuu » ho chu, ho cua, so cuu
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu ve cam ((xuc gia) or (luc gia)) thanh ((ha cuu) OR (ho cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang x hoi. hieu ve cam ((xuc gia) OR (luc gia)) thanh ((ha cuu) OR (ho cuu)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang x hoi. hieu ve cam ((xuc gia) or (luc gia)) thanh ((ha cuu) OR (ho cuu)) tre*".