Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
chat cua » nhat cua, chat va, ca cua
chat huu » pham huu
hieu ve » hieu va, hieu van
nang co » nang cao, nang doc, nang noi
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
ve cau » ke cau, va cau, ve cac
ve ca » ve cac, ve cai, ve cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang co hoc. hieu ve ((chat cua) or (chat huu)) va hanh ((ve ca) OR (ve cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang co hoc. hieu ve ((chat cua) OR (chat huu)) va hanh ((ve ca) OR (ve cau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang co hoc. hieu ve ((chat cua) or (chat huu)) va hanh ((ve ca) OR (ve cau)) tren".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang co hoc. hieu ve ((chat cua) or (chat huu)) va hanh ((ve ca) OR (ve cau)) tren*.