Perhaps you should try some spelling variations:
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cac, ve cai
vi cau » va cau, di cau, viet cau
ve cau » ke cau, va cau, ve cac
va cam » va cham, va cac, va cao
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 ty nang x hoi. hieu ((ve cam) or (va cam)) thuc va hanh ((vi cau) OR (ve cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((ve cam) OR (va cam)) thuc va hanh ((vi cau) OR (ve cau)) tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu ((ve cam) or (va cam)) thuc va hanh ((vi cau) OR (ve cau)) tren*".