Perhaps you should try some spelling variations:
hanh may » hanh ma, hanh mau, hanh ngay
te sach » toc sach
ky dang » ky nang
ky danh » ky anh
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
may duc » mai duc, my duc
duc tre » duoc tren, duc tien
tuc va » thuc va, truc va, tuc xa

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 ((ky dang) or (ky danh)) ma hoa. hieu va cac tuc va hanh may duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky dang) OR (ky danh)) ma hoa. hieu va cac tuc va hanh may duc tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((ky dang) or (ky danh)) ma hoa. hieu va cac tuc va hanh may duc tre*.