Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vai » thanh hai, thanh van, thanh tai
kho tang » cao tang
hieu van » hieu va, thien van, lieu va
dua ban » dia ban, cua ban, mua ban
vai cua » dai cua, hai cua, lai cua
qua ban » cua ban, qua quan
tu sach » thu sach, su sach, te sach
ky tang » ky nang, ky dang, ky trong
van lam » van nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky tang) OR (kho tang)) ma hoa. hieu van lam ((dua ban) or (qua ban)) thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky tang) OR (kho tang)) ma hoa. hieu van lam ((dua ban) OR (qua ban)) thanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky tang) OR (kho tang)) ma hoa. hieu van lam ((dua ban) or (qua ban)) thanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky tang) OR (kho tang)) ma hoa. hieu van lam ((dua ban) or (qua ban)) thanh vai cua triet*.