Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cua tuc » cua duc, cua thuoc, luat tuc
cac lo » cac lop, cac co, cac bo
cua tu » cua su, cua cu, cua te
lo va » lo van, lao va, ly va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (toc sach)) ky nang xa hoi. hieu hien cac lo va hanh vai ((cua tu) OR (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky nang xa hoi. hieu hien cac lo va hanh vai ((cua tu) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky nang xa hoi. hieu hien cac lo va hanh vai ((cua tu) OR (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang xa hoi. hieu hien cac lo va hanh vai ((cua tu) OR (cua tuc))*.