Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
dung doi » huong doi, dung tai, dung co
su sach » so sach, vu sach
duoc va » nuoc va, duc va, duoc ma
doi cuu » doi cua, doi cuoc
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
tuoc va » thuoc va, nuoc va, quoc va
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, tuc xa

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