Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thanh do » thanh de, thanh pho, thanh hoa
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty hang xa hoi. hieu ((van nam) or (van lam)) duc tan thanh do ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty hang xa hoi. hieu ((van nam) OR (van lam)) duc tan thanh do ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty hang xa hoi. hieu ((van nam) or (van lam)) duc tan thanh do ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: vu sach ty hang xa hoi. hieu ((van nam) or (van lam)) duc tan thanh do ((cua tre) OR (cuu tre))*.