Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban danh » ban doanh, ban hanh, ban dan
pham cac » phan cac, pham ca, pham can
van pham » san pham, van phan, van phat
cua tre » cuu tre, cua triet, dua tren
danh va » doanh va, hanh va, anh va
cac ban » cac dan, cac van, can ban
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((lang xa) or (nang ma)) hoi. hieu van pham cac ban danh va ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((lang xa) OR (nang ma)) hoi. hieu van pham cac ban danh va ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach ty ((lang xa) or (nang ma)) hoi. hieu van pham cac ban danh va ((cua tre) or (cua te))*.