Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
tuc van » thuc van, truc van, duc van
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
va cau » van cau, va dau, va cao
tuc va » thuc va, truc va, tuc xa
vi luu » vi lua

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 y nang xa hoi. lieu ((va cau) OR (va cac)) ((tuc van) or (tuc va)) hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. lieu ((va cau) OR (va cac)) ((tuc van) OR (tuc va)) hanh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. lieu ((va cau) OR (va cac)) ((tuc van) or (tuc va)) hanh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. lieu ((va cau) OR (va cac)) ((tuc van) or (tuc va)) hanh vi luu tre*.