Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
thi van » thi lan, thi hanh, thi nang
nam tu » nam thu, nam thuc
vi cau » va cau, di cau, viet cau
ve cau » ke cau, va cau, ve cac
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. ((thien van) or (thi van)) nam tu va thanh ((vi cau) OR (ve cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. ((thien van) OR (thi van)) nam tu va thanh ((vi cau) OR (ve cau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. ((thien van) or (thi van)) nam tu va thanh ((vi cau) OR (ve cau)) tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((thien van) or (thi van)) nam tu va thanh ((vi cau) OR (ve cau)) tren*.