Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
van bay » van ban, van bao, van bac
tai cua » thai cua, tai cuc, tri cua
qua ban » cua ban, qua quan
van cay » van cau, van ca, van chat
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
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) OR (van bay)) qua 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) OR (van bay)) qua 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) OR (van bay)) qua 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) OR (van bay)) qua ban thanh tai cua te*.