Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
cua triet » cua viet, su triet, va triet
danh doi » danh di, thanh doi, dung doi
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, duoc va, tuc va
cua tre » cua te, cuu tre, dua tren

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. hieu hien bach ((tuoc va) or (nuoc va)) danh doi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. hieu hien bach ((tuoc va) OR (nuoc va)) danh doi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu hien bach ((tuoc va) or (nuoc va)) danh doi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu hien bach ((tuoc va) or (nuoc va)) danh doi ((cua tre) OR (cua triet))*.