Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
bach xuc » bach tuoc, bach xuan, bach hue
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va tinh » may tinh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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 ty nang xa hoi. hieu vien bach xuc ((va tinh) or (gia thanh)) va ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu vien bach xuc ((va tinh) OR (gia thanh)) va ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu vien bach xuc ((va tinh) or (gia thanh)) va ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu vien bach xuc ((va tinh) or (gia thanh)) va ((cua tre) OR (cuu tre))*.