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
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van anh » van thanh, van minh
vai cua » dai cua, hai cua, lai cua
cua te » cua tu
tuan » quan, tran, luan

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) or (tuan anh)) vai cua te~.
• 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) OR (tuan anh)) vai cua te*.
• 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) or (tuan anh)) vai cua te*".