Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
cau tren » cu tren, dau tren, ca tren
sach thi » sach thu, sach tai, sach thieu
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
thi hang » thi hanh, thi nang, thi hong
nam xuc » cam xuc, nam xua, nam thuc
xuc ban » duc ban, cuc ban, quoc ban
hang xa » hoang xa, hang va, hang ca
cuu tre » cua tre, cau treo
su sach » so sach, vu sach

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 thi hang xa hoi. hieu van nam xuc ban thanh van ((((cuu tre) OR (cau tren))) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi hang xa hoi. hieu van nam xuc ban thanh van ((((cuu tre) OR (cau tren))) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thi hang xa hoi. hieu van nam xuc ban thanh van ((((cuu tre) OR (cau tren))) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach thi hang xa hoi. hieu van nam xuc ban thanh van ((((cuu tre) OR (cau tren))) or (su triet))*.