Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, sang ma, nang cao
van cay » van cau, van bay, van ca
qua ban » qua quan
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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