Perhaps you should try some spelling variations:
nang tai » hang tai, tang tai, sang tai
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
ca tren » cau tren, cu tren, la tren
tai hoi » tai khoi, dai hoi, tai hai
ve cac » va cac, vien cac
va cai » va cac, va bai, va dai
xuc va » duc va, tuc va, luc va
vai ca » vai cac, vai cua, bai ca
ve cau » ke cau, va cau, le cau

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 tai hoi. hieu ((((va cai) or (ve cau))) or (ve cac)) xuc va hanh vai ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang tai hoi. hieu ((((va cai) OR (ve cau))) OR (ve cac)) xuc va hanh vai ca tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang tai hoi. hieu ((((va cai) or (ve cau))) or (ve cac)) xuc va hanh vai ca tren*.