Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
ve cham » va cham, ve chat, vu cham
va chua » vua chua, ca chua, va chu
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ve cam » ve cac, va cam, ve cai
va cua » via cua, ca cua, ma 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 ty nang cau hoi. hieu ((ve cam) or (ve cham)) ly va danh ((va cua) OR (va chua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang cau hoi. hieu ((ve cam) OR (ve cham)) ly va danh ((va cua) OR (va chua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang cau hoi. hieu ((ve cam) or (ve cham)) ly va danh ((va cua) OR (va chua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang cau hoi. hieu ((ve cam) or (ve cham)) ly va danh ((va cua) OR (va chua)) tre*.