Perhaps you should try some spelling variations:
hien bach » vien bach, thien hach, hien hanh
hieu hien » bieu hien, dieu hien, chieu chien
danh dien » dinh dien, danh kien, danh lien
dien cuc » dien tu, dieu cua, vien cac
su sach » so sach, vu sach
tuoc va » thuoc va, nuoc va, duoc va
cuc tre » duc tre, cua tre, cuu tre
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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