Perhaps you should try some spelling variations:
dong cua » dung cua, cong cua, huong cua
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ve dat » de dat, va dat, viec dat
ve dao » de dao, va dao, ve bao
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: tu sach y nang xa hoi. hieu ((ve dat) OR (ve dao)) nuoc va hanh ((di cua) or (dong cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((ve dat) OR (ve dao)) nuoc va hanh ((di cua) OR (dong cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ((ve dat) OR (ve dao)) nuoc va hanh ((di cua) or (dong cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((ve dat) OR (ve dao)) nuoc va hanh ((di cua) or (dong cua)) te*.