Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
vai cuu » vai cua
qua ban » cua ban, qua quan
nam qua » nam quan, nam cua, nam mua
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach ty, sach kem
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sach y)) nang ((ma hoi) or (ma hoa)). hieu van nam qua ban thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang ((ma hoi) OR (ma hoa)). hieu van nam qua ban thanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang ((ma hoi) or (ma hoa)). hieu van nam qua ban thanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang ((ma hoi) or (ma hoa)). hieu van nam qua ban thanh vai cuu tre*.