Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
hieu vien » hieu hien, hieu viec, thieu nien
va thanh » gia thanh, ban thanh, va tinh
vien cac » vien bach, vien dai, vien da
vu sach » vu bach, su sach, vu khach
dam cuu » dam cua, dam cuoi, cham cuu
cac luc » cau luc, coc luc, cac nuoc
ly hang » ly quang
ly nang » ky nang, ly vang, ly quang
so sach » so sanh, bo sach, co sach
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (so sach)) ((ly nang) OR (ly hang)) xa hoi. hieu vien cac luc va thanh dam cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) ((ly nang) OR (ly hang)) xa hoi. hieu vien cac luc va thanh dam cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (so sach)) ((ly nang) OR (ly hang)) xa hoi. hieu vien cac luc va thanh dam cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) ((ly nang) OR (ly hang)) xa hoi. hieu vien cac luc va thanh dam cuu tre*.