Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nhan luc » nang luc
va hanh » van hanh, va thanh, ban hanh
va dinh » van dinh, va kinh, va tinh
va danh » va dan, dia danh, va thanh
te sach » toc sach
va nhan » van nhan, ca nhan, va phan
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
y tang » ky tang, 6 tang, 7 tang
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: te sach y tang ma hoi. hieu va nhan luc ((((va danh) OR (va dinh))) or (va hanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang ma hoi. hieu va nhan luc ((((va danh) OR (va dinh))) OR (va hanh)) dai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y tang ma hoi. hieu va nhan luc ((((va danh) OR (va dinh))) or (va hanh)) dai cua triet*".