Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
tu sach » thu sach, su sach, te sach
ve chat » va chat, van chat
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ve tai » te tai, de tai, le tai
ve cai » va cai, ve cac, ve cau
va cua » va chua, via cua, ca 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 cai) OR (ve tai))) or (ve chat)) ly va danh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang cau hoi. hieu ((((ve cai) OR (ve tai))) OR (ve chat)) ly va danh va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang cau hoi. hieu ((((ve cai) OR (ve tai))) or (ve chat)) ly va danh va cua tre*".