Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
chat duc » chat xuc, chat doc, chet duoc
duc minh » duc anh
hang van » hoang van, dang van, tang van
va triet » va thiet, va trien, ve triet
ty nang » ty xang, ty hang, ly nang
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
ma hoi » mai hoi, xa hoi, ma hoa

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