Perhaps you should try some spelling variations:
hieu vien » hieu viec, thieu nien, hieu tieng
hieu hien » bieu hien, dieu hien, chieu chien
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
hanh hoi » hanh thoi, hanh noi, hanh hoa
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
hoi cua » hoi chuc
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
cua tu » cua tuc, cua su, cua cu

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) or (doc sach)) ly nang xa hoi. ((hieu vien) OR (hieu hien)) cam xuc van hanh hoi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ly nang xa hoi. ((hieu vien) OR (hieu hien)) cam xuc van hanh hoi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (doc sach)) ly nang xa hoi. ((hieu vien) OR (hieu hien)) cam xuc van hanh hoi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ly nang xa hoi. ((hieu vien) OR (hieu hien)) cam xuc van hanh hoi cua tu*.