Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
phuc van » thuc van, phuc va, chuc van
cau phuc » cau truc, chau phu, huu phuc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hanh de » hanh ve, hanh kem
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
de cua » le cua, te cua, dieu cua

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 ((nang xa) or (sang ma)) hoi. ((hieu ve) OR (hieu va)) cau phuc van hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (sang ma)) hoi. ((hieu ve) OR (hieu va)) cau phuc van hanh de cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) or (sang ma)) hoi. ((hieu ve) OR (hieu va)) cau phuc van hanh de cua tre*".