Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » thanh va, thanh ve, nhanh vi
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
cam ly » tam ly, cam ky, cam lo
ly van » le van, ly va, ly von

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 y nang ma hoi. hieu ve cam ly van ((thanh vi) or (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu ve cam ly van ((thanh vi) OR (hanh vi)) cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu ve cam ly van ((thanh vi) or (hanh vi)) cua triet*.