Perhaps you should try some spelling variations:
van thanh » ban thanh
cham duc » pham duc, cham soc, pham duy
van tuan » van quan, van ban, anh tuan
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ((ma hoi) or (ma hoa)). hieu ve cham duc ((van thanh) OR (van tuan)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((ma hoi) OR (ma hoa)). hieu ve cham duc ((van thanh) OR (van tuan)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((ma hoi) or (ma hoa)). hieu ve cham duc ((van thanh) OR (van tuan)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (ma hoa)). hieu ve cham duc ((van thanh) OR (van tuan)) vai cua tre*.