Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hien cac » thien cac, vien cac, dien cac
hieu cac » hieu luc, hieu va, hieu van
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua su

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 ky dang xay hoi. bieu ((hien cac) OR (hieu cac)) vi van hanh dai ((cua tu) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang xay hoi. bieu ((hien cac) OR (hieu cac)) vi van hanh dai ((cua tu) OR (cua cu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xay hoi. bieu ((hien cac) OR (hieu cac)) vi van hanh dai ((cua tu) or (cua cu))*".