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