Perhaps you should try some spelling variations:
hien bach » vien bach, thien hach, dien sach
hien hanh » dieu hanh
duoc va » nuoc va, duc va, duoc ma
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
tuoc va » thuoc va, nuoc va, tuc va
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
su sac » su sach, su cac, su xac

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

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