Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
toc sach » hoc sach, doc sach, thuoc sach
hien cac » thien cac, vien cac, hieu cac
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cac lop » cac hop, cac loai
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
lop va » lap va, hop va, nop va
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: ((tu sach) or (toc sach)) ky nang xa hoi. hieu hien cac lop va hanh vai cua tu~.
• 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 lop va hanh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang xa hoi. hieu hien cac lop va hanh vai cua tu*.