Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
thuoc va » thuc va, thuoc ma, thuong va
su sach » so sach, vu sach
duoc va » nuoc va, duc va, duoc ma
sach ky » sac ky, sach y, sach ty
tu cuu » tu huu, tu cua, tu chu
x hoi » xa hoi, o hoi, x ho

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