Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
vu sach » vu bach, su sach, vu khach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cuu tre, cua triet, dua tren
cao duc » dao duc, cao suc, tao duoc
sach ty » sach y, sach tu, sach thu
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: vu sach ty nang xa hoi. hieu va ((cao duc) or (giao duc)) ban thanh vai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang xa hoi. hieu va ((cao duc) OR (giao duc)) ban thanh vai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang xa hoi. hieu va ((cao duc) or (giao duc)) ban thanh vai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang xa hoi. hieu va ((cao duc) or (giao duc)) ban thanh vai ((cua tre) OR (cua te))*.