Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
soc gia » toc gia, hoc gia, so gia
vi su » ve su, ki su, oi su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. hieu van cham soc gia thanh ((vi su) OR (va su)) tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu van cham soc gia thanh ((vi su) OR (va su)) tren".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu van cham soc gia thanh ((vi su) OR (va su)) tren*.