Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
chat duc » chat xuc, chat doc, chet duoc
duc manh » suc manh, duc anh, duc minh
hang van » hoang van, dang van, tang van
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat

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 xa hoi. hieu va chat duc manh ((hang van) or (hang va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. hieu va chat duc manh ((hang van) OR (hang va)) cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu va chat duc manh ((hang van) or (hang va)) cua triet*.