Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
hieu van » hieu va, thien van, lieu va
dang tao » sang tao, nang tao, vang tao
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu va
sach ky » sac ky, sach y, sach ty
cac duc » cac du, cao duc, cac dac
ky dang » ky nang, ky danh
hai cua » thai cua, dai cua, lai cua
hoi cua » hoi chuc
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky dang tao hoi. ((hieu ve) OR (hieu van)) cac duc tan hanh ((hai cua) or (hoi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang tao hoi. ((hieu ve) OR (hieu van)) cac duc tan hanh ((hai cua) OR (hoi cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang tao hoi. ((hieu ve) OR (hieu van)) cac duc tan hanh ((hai cua) or (hoi cua)) triet*".