Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cham duc » pham duc, cham soc, pham duy
vinh cuu » dinh cuu, sinh cua, dinh cu
su sach » vu sach
duc van » duc va, duc tan, duc manh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
xang xa » lang xa, mang xa, ang xa
so sach » so sanh, bo sach, co sach
vi cuu » vi luu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (so sach)) ty xang xa hoi. hieu va cham duc van thanh ((vi cuu) or (vinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty xang xa hoi. hieu va cham duc van thanh ((vi cuu) OR (vinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ty xang xa hoi. hieu va cham duc van thanh ((vi cuu) or (vinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ty xang xa hoi. hieu va cham duc van thanh ((vi cuu) or (vinh cuu)) tre*.