Perhaps you should try some spelling variations:
cuc triet » cua triet, su triet, cac trieu
thanh tai » thanh hai, thanh toan, doanh tai
bach tuoc » sach duoc, sach nuoc
va thanh » gia thanh, ban thanh, va tinh
bac tuc » bac tu, bac thua
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((nang xa) or (nang ma)) hoi. hieu va ((bac tuc) or (bach tuoc)) va thanh tai cuc triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang ma)) hoi. hieu va ((bac tuc) OR (bach tuoc)) va thanh tai cuc triet.
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (nang ma)) hoi. hieu va ((bac tuc) or (bach tuoc)) va thanh tai cuc triet*.