Perhaps you should try some spelling variations:
hien cac » thien cac, vien cac, dien cac
hieu cac » hieu luc, hieu va, hieu van
su sach » so sach, vu sach
anh vai » anh va, anh bai, anh van
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
van anh » van thanh, tuan anh, van minh
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: su sach ty nang xa hoi. bieu ((hien cac) or (hieu cac)) vo van anh vai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. bieu ((hien cac) OR (hieu cac)) vo van anh vai ((cua te) OR (cua tu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. bieu ((hien cac) or (hieu cac)) vo van anh vai ((cua te) OR (cua tu))*".