Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac duc » cao duc, cac dac, cac nuoc
va danh » va dinh, va dan, va hanh
danh ca » dan ca, doanh cua, danh cho
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
ca su » cua su, cao su, ca sau

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 xa hoi. hieu ve ((cac duc) OR (cac du)) va danh ca su tien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang xa hoi. hieu ve ((cac duc) OR (cac du)) va danh ca su tien".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu ve ((cac duc) OR (cac du)) va danh ca su tien*.