Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
te sach » toc sach
vu dang » su dang, vu quang, cua dang
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
v nang » va nang, vu nang, van nang
vi cua » di cua

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 (vu dang)) xa hoi. hieu van pham duc va danh ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (vu dang)) xa hoi. hieu van pham duc va danh ((vi cua) OR (vai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (vu dang)) xa hoi. hieu van pham duc va danh ((vi cua) or (vai cua)) triet*.