Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
mua ban » cua ban
lap cua » lai cua, tap cua, lam cua
qua ban » cua ban, qua quan
van lam » van nam
nang ma » tang ma, sang ma, nang cao
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet

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