Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
hanh le » thanh le, hanh ve, hanh de
duc van » duc va, duc tan, duc manh
dau duc » dao duc, dang duc, dau nuoc
van dau » van dao, phan dau
te sach » toc sach
sach va » sach xa, sach ha, sach dao
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cuu tre » cua tre, cau tren, cau treo
le cuu » le cua, le huu, le cau

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 va ((nang xa) or (nang ma)) hoi. hieu van dau duc van hanh le cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach va ((nang xa) OR (nang ma)) hoi. hieu van dau duc van hanh le cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach va ((nang xa) or (nang ma)) hoi. hieu van dau duc van hanh le cuu tre*.