Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien hach » thien thanh, hien hanh
danh dien » dinh dien, danh kien, danh lien
dien cua » dieu cua, dien cuc, dien cu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, tuc va
duoc va » nuoc va, duc va, duoc ma
cua tre » cua te, cuu tre, cua triet

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. hieu thien hach ((tuoc va) or (duoc va)) danh dien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu thien hach ((tuoc va) OR (duoc va)) danh dien cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu thien hach ((tuoc va) or (duoc va)) danh dien cua tre*.