Perhaps you should try some spelling variations:
van nang » van quang, van ban, van dong
te sach » toc sach
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
v nang » va nang, vu nang, voi nang
va cam » va cham, va cac, va cao
cua tu » cua tuc, cua su, cua cu

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