Perhaps you should try some spelling variations:
thanh may » thanh tay, hanh may, thanh mau
doc sach » hoc sach, toc sach, nuoc sach
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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) or (doc sach)) y nang ma hoi. hieu ve cac duc va thanh may ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) y nang ma hoi. hieu ve cac duc va thanh may ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) y nang ma hoi. hieu ve cac duc va thanh may ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) y nang ma hoi. hieu ve cac duc va thanh may ((cua tre) OR (cuu tre))*.