Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
cham duc » pham duc, cham soc, pham duy
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cua triet, dua tren
duc van » duc va, duc tan, duc manh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
ly hang » ly quang
ly nang » ky nang, ly vang, ly quang
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: vu sach ((ly nang) OR (ly hang)) xa hoi. hieu va cham duc van thanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ly nang) OR (ly hang)) xa hoi. hieu va cham duc van thanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ly nang) OR (ly hang)) xa hoi. hieu va cham duc van thanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ly nang) OR (ly hang)) xa hoi. hieu va cham duc van thanh vi ((cua tre) or (cuu tre))*.