Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
dinh duy » dinh duc, dinh du, dinh quy
tuoc va » thuoc va, nuoc va, tuc va
duy cua » day cua, dung cua
duoc va » nuoc va, duc va, duoc ma
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
su xac » pu xac, su cac
su sac » su sach, su cac

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) or (su xac)) ky nang xa hoi. hieu hien bach ((tuoc va) or (duoc va)) dinh duy cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky nang xa hoi. hieu hien bach ((tuoc va) OR (duoc va)) dinh duy cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky nang xa hoi. hieu hien bach ((tuoc va) or (duoc va)) dinh duy cua tre*.