Perhaps you should try some spelling variations:
dung cua » dung luan, dung cho
cap nuoc » dat nuoc
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
di cua » dai cua, doi cua, de cua

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 ty nang xa hoi. ((hieu ve) OR (hieu va)) cap nuoc va hanh ((di cua) or (dung cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang xa hoi. ((hieu ve) OR (hieu va)) cap nuoc va hanh ((di cua) OR (dung cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang xa hoi. ((hieu ve) OR (hieu va)) cap nuoc va hanh ((di cua) or (dung cua)) tre*".