Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
cau luc » cau truc, cau phuc
cam luc » cam xuc
y nang » ky nang, ly nang, v nang
ve cua » le cua, de cua, te cua
cua te » cua tu
x hoi » o hoi, x ho, 5 hoi

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