Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh dat » thanh san, thanh hai, thanh ha
de triet » ve triet, de thiet, su triet
va cham » va chat, va tham
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ve chim » va chim, ve cham, ve chinh
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
ha hoi » hoa hoi, ha noi, xa 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 dang ha hoi. hieu ((ve chim) or (va cham)) tuc xa ((thanh dat) OR (thanh van)) de triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang ha hoi. hieu ((ve chim) OR (va cham)) tuc xa ((thanh dat) OR (thanh van)) de triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang ha hoi. hieu ((ve chim) or (va cham)) tuc xa ((thanh dat) OR (thanh van)) de triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang ha hoi. hieu ((ve chim) or (va cham)) tuc xa ((thanh dat) OR (thanh van)) de triet*.