Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
duc manh » duc anh, duc minh, duc tan
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cao » va cao, ve bao, ve cac
de cua » te cua, dieu cua
le cua » ly cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang x hoi. hieu ve cao ((duc manh) OR (suc manh)) hanh ((de cua) or (le cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang x hoi. hieu ve cao ((duc manh) OR (suc manh)) hanh ((de cua) OR (le cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang x hoi. hieu ve cao ((duc manh) OR (suc manh)) hanh ((de cua) or (le cua)) te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang x hoi. hieu ve cao ((duc manh) OR (suc manh)) hanh ((de cua) or (le cua)) te*.