Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
nang noi » nang doc
tu sach » thu sach, su sach, te sach
noi hoi » noi doi, doi hoi, hoi hoi
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va danh, ban hanh
ve cac » va cac, vien cac
vi cua » vai cua, di 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 ky nang noi hoi. hieu ve cac xuc ((((va hanh) OR (va thanh))) or (gia thanh)) vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang noi hoi. hieu ve cac xuc ((((va hanh) OR (va thanh))) OR (gia thanh)) vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang noi hoi. hieu ve cac xuc ((((va hanh) OR (va thanh))) or (gia thanh)) vi cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang noi hoi. hieu ve cac xuc ((((va hanh) OR (va thanh))) or (gia thanh)) vi cua vat*.