Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
cau theo » cau thi, cau tao
cau treo » cau tren, cau triet, cau trieu
hien cac » thien cac, vien cac, hieu cac
hanh va » hang va, hanh vi
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
loc va » hoc va, luc va
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. hieu hien cac ((loc va) or (duc va)) hanh va ((cau treo) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu hien cac ((loc va) OR (duc va)) hanh va ((cau treo) OR (cau theo)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu hien cac ((loc va) or (duc va)) hanh va ((cau treo) or (cau theo))*.