Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
ve bac » ve bao, ve ban, he bac
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
do van » dao van, vo van, so van
vi cua » vai cua, di cua

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 hoi. hieu ((ve bac) or (ve cac)) do van thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu ((ve bac) OR (ve cac)) do van thanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang xa hoi. hieu ((ve bac) or (ve cac)) do van thanh vi cua triet*.