Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » vanh dai, thanh dat, thanh dam
hanh tai » thanh tai, hang tai, han tai
hanh dao » lanh dao, thanh dat, thanh dam
hieu ve » hieu va, hieu van
cam cua » ca cua, nam cua, cau cua
nang ma » tang ma, sang ma, nang cao
hoc sac » hoc sach, hoc cac, hoc mac
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sac ky nang ma hoi. hieu ve cam cua ban ((((hanh dai) OR (hanh dao))) or (hanh tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky nang ma hoi. hieu ve cam cua ban ((((hanh dai) OR (hanh dao))) OR (hanh tai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sac ky nang ma hoi. hieu ve cam cua ban ((((hanh dai) OR (hanh dao))) or (hanh tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang ma hoi. hieu ve cam cua ban ((((hanh dai) OR (hanh dao))) or (hanh tai)) cua triet*.