Perhaps you should try some spelling variations:
van thanh » van tuan
ban thanh » ban hanh, ban hang
cham duc » pham duc, cham soc, pham duy
cua tre » cua te, cua triet, dua tren
vu sach » vu bach, su sach, vu khach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu va cham duc ((van thanh) OR (ban thanh)) vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. hieu va cham duc ((van thanh) OR (ban thanh)) vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. hieu va cham duc ((van thanh) OR (ban thanh)) vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. hieu va cham duc ((van thanh) OR (ban thanh)) vi ((cua tre) or (cuu tre))*.