Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
danh bat » doanh bat, anh bai, dinh ba
vien cac » vien bach, vien dai, vien da
bat cua » ban cua, mat cua, bai cua
va danh » va dinh, va dan, va hanh
cac luc » cau luc, coc luc, cac nuoc
tu sach » thu sach, su sach, tu cach
ky dang » ky danh
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
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: ((tu sach) OR (te sach)) ((ky nang) or (ky dang)) xa hoi. hieu vien cac luc va danh bat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ((ky nang) OR (ky dang)) xa hoi. hieu vien cac luc va danh bat cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ((ky nang) or (ky dang)) xa hoi. hieu vien cac luc va danh bat cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ((ky nang) or (ky dang)) xa hoi. hieu vien cac luc va danh bat cua tre*.