Perhaps you should try some spelling variations:
thanh ki » thanh kim, thanh ky, thanh ke
su triet » su viet, su tien, ve triet
tu cach » tu cac
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cam tac » cac tac, cam tay, can tac
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
ki su » ky su
gia » giao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (tu sach)) ky nang ma hoi. hieu ve cam tac gia thanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (tu sach)) ky nang ma hoi. hieu ve cam tac gia thanh ki su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (tu sach)) ky nang ma hoi. hieu ve cam tac gia thanh ki su triet*.