Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
te sach » toc sach
cua tre » cuu tre, cua triet, dua tren
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
ly nang » ky nang, ly vang, ly quang
ly hang » ly quang
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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