Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, ban hanh
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, dia danh
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao
y nang » ky nang, ly nang, v nang
ve cai » va cai, ve cac, ve tai
cua te » cua tu

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 cai) or (va cam)) tuc ((va hanh) OR (va danh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((ve cai) OR (va cam)) tuc ((va hanh) OR (va danh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ((ve cai) or (va cam)) tuc ((va hanh) OR (va danh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((ve cai) or (va cam)) tuc ((va hanh) OR (va danh)) vi cua te*.