Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
cau tren » cu tren, dau tren, ca tren
cac ban » cac dan, cac van, can ban
nang xa » nang x, lang xa, mang xa
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cam cac » ca cac, nam cac, cam chan
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky ((nang xa) or (nang ma)) hoi. hieu ve cam cac ban thanh tai ((cua triet) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky ((nang xa) OR (nang ma)) hoi. hieu ve cam cac ban thanh tai ((cua triet) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((nang xa) or (nang ma)) hoi. hieu ve cam cac ban thanh tai ((cua triet) or (cau tren))*.