Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thien nang » thien bang, thien dang, trien nang
phan cua » nhan cua, than cua, phat cua
tu sach » thu sach, su sach, te sach
dua ban » dia ban, cua ban, mua ban
qua ban » cua ban, qua quan
cua tre » cua te, cuu tre, cua triet
nang ca » nang cao, nang cap, nang cai
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang

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 sang) OR (ky tang)) ma hoa. thien nang ca ((dua ban) or (qua ban)) thanh phan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky tang)) ma hoa. thien nang ca ((dua ban) OR (qua ban)) thanh phan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky sang) OR (ky tang)) ma hoa. thien nang ca ((dua ban) or (qua ban)) thanh phan cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) OR (ky tang)) ma hoa. thien nang ca ((dua ban) or (qua ban)) thanh phan cua tre*.