Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
duc manh » suc manh, duc anh, duc minh
hanh dai » hanh tai, hanh dao, thanh dat
vanh dai » van dai, vanh tai, lanh dao
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc phan
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: su sach ty nang xa hoi. hieu ve cam ((duc van) or (duc manh)) ((hanh dai) or (vanh dai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ve cam ((duc van) OR (duc manh)) ((hanh dai) OR (vanh dai)) cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ve cam ((duc van) or (duc manh)) ((hanh dai) or (vanh dai)) cua triet*.