Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban thanh » ban hanh, ban hang
thanh ve » hanh ve, thanh va, thanh vien
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
luc ban » duc ban, cuc ban, luc bat
cua tre » cuu tre, cua triet, dua tren
v nang » va nang, vu nang, van nang
cua te » cua tu

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

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