Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
manh thanh » danh thanh, minh thanh, manh thang
toan cuu » toan cau, toan cua, toan cao
te sach » toc sach
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cai, ve cau
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ma hoi. hieu ((((ve cam) OR (va cam))) or (ve cac)) suc manh thanh toan cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. hieu ((((ve cam) OR (va cam))) OR (ve cac)) suc manh thanh toan cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoi. hieu ((((ve cam) OR (va cam))) or (ve cac)) suc manh thanh toan cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. hieu ((((ve cam) OR (va cam))) or (ve cac)) suc manh thanh toan cuu tre*.