Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dao » lanh dao, thanh dat, thanh dam
vu sach » vu bach, su sach, vu khach
nang ma » tang ma, sang ma, nang cao
dao cua » dai cua, day cua, dan cua
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
tuc va » thuc va, truc va, duc va
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: ((tu cac) or (vu sach)) ky nang ma hoi. hieu ve cac ((tuc va) OR (tuc xa)) hanh dao cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (vu sach)) ky nang ma hoi. hieu ve cac ((tuc va) OR (tuc xa)) hanh dao cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (vu sach)) ky nang ma hoi. hieu ve cac ((tuc va) OR (tuc xa)) hanh dao cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (vu sach)) ky nang ma hoi. hieu ve cac ((tuc va) OR (tuc xa)) hanh dao cua triet*.