Perhaps you should try some spelling variations:
cac truc » cau truc, cac tru, cac trung
cau treo » cau theo, cau triet, cau trieu
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
truc va » thuc va, thuc vat, trung va
danh ca » doanh cua, danh cho, danh gia
y nang » ky nang, ly nang, v nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu qua cac truc va ((danh ca) OR (dan ca)) ((cau treo) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu qua cac truc va ((danh ca) OR (dan ca)) ((cau treo) or (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu qua cac truc va ((danh ca) OR (dan ca)) ((cau treo) or (cau tren))*.