Perhaps you should try some spelling variations:
vinh cuu » dinh cuu, sinh cua, dinh cu
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau
tuc va » thuc va, truc va, tuc xa
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: vu sach y nang xa hoi. lieu va cau ((duc van) or (tuc va)) hanh ((vi cuu) OR (vinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. lieu va cau ((duc van) OR (tuc va)) hanh ((vi cuu) OR (vinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. lieu va cau ((duc van) or (tuc va)) hanh ((vi cuu) OR (vinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. lieu va cau ((duc van) or (tuc va)) hanh ((vi cuu) OR (vinh cuu)) tre*.