Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
hien hanh » dieu hanh
danh doi » danh di, thanh doi, dung doi
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, tuc va
sach ky » sac ky, sach y, sach ty
cua tre » cuu tre, cua triet, dua tren
duoc va » nuoc va, duc va, duoc ma
cua te » cua tu

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 nang xa hoi. bieu hien hanh ((tuoc va) or (duoc va)) danh doi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. bieu hien hanh ((tuoc va) OR (duoc va)) danh doi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. bieu hien hanh ((tuoc va) or (duoc va)) danh doi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. bieu hien hanh ((tuoc va) or (duoc va)) danh doi ((cua tre) OR (cua te))*.