Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
de triet » ve triet, de thiet, su triet
xa thanh » va thanh, ha thanh, ta thanh
nang han » nang phan, nang hang, nang hanh
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
tu sach » thu sach, su sach, te sach
nang ha » nang hai, nang hoa, lang ha
ve chim » va chim, ve cham, ve chinh
dat de » vat de, dat ve, hat de

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 ((nang ha) OR (nang han)) hoi. hieu ((ve chim) or (va cham)) tuc xa thanh dat de triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang ha) OR (nang han)) hoi. hieu ((ve chim) OR (va cham)) tuc xa thanh dat de triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang ha) OR (nang han)) hoi. hieu ((ve chim) or (va cham)) tuc xa thanh dat de triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang ha) OR (nang han)) hoi. hieu ((ve chim) or (va cham)) tuc xa thanh dat de triet*.