Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
tai su » tai so, tai tu, lai su

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) OR (sac ky)) ((nang xa) or (lang xa)) hoi. hieu va cam luc va thanh tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) ((nang xa) OR (lang xa)) hoi. hieu va cam luc va thanh tai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) ((nang xa) or (lang xa)) hoi. hieu va cam luc va thanh tai su triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) ((nang xa) or (lang xa)) hoi. hieu va cam luc va thanh tai su triet*.