Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
hang tai » hang va, dung tai
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
dua tren » dung tren
te sach » toc sach
ky hang » ky nang, ly hang, ky dang
tai hai » thi hai, dai hai, tai ha
sach ky » sac ky, sach y, sach ty
tuc va » thuc va, truc va, duc va
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: te sach ky hang tai hai. hieu van tham ((tuc va) OR (tuc xa)) thanh lap ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky hang tai hai. hieu van tham ((tuc va) OR (tuc xa)) thanh lap ((dua tren) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky hang tai hai. hieu van tham ((tuc va) OR (tuc xa)) thanh lap ((dua tren) or (cua te))*".