Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
duc manh » suc manh, duc anh, duc minh
hanh lam » thanh lap, hanh kem, hanh va
va triet » va thiet, va trien, ve triet
va nang » van nang, da nang, cam nang
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
v nang » vu nang, van nang, voi nang
lam va » nam va, dam va, lam ha

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 ((v nang) OR (va nang)) ma hoi. hieu va cac ((duc manh) or (duc tan)) hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((v nang) OR (va nang)) ma hoi. hieu va cac ((duc manh) OR (duc tan)) hanh lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((v nang) OR (va nang)) ma hoi. hieu va cac ((duc manh) or (duc tan)) hanh lam va triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((v nang) OR (va nang)) ma hoi. hieu va cac ((duc manh) or (duc tan)) hanh lam va triet*.