Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
cau triet » cau trieu, cua triet, va triet
duc manh » suc manh, duc anh, duc minh
su triet » su viet, ve triet
dang tay » dang xay, dung tay, dan tay
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, cao duc, pham duc
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
tay hoi » tay ho, tao hoi, tay thai
ky dang » ky nang, ky danh
su tien » su kien, su hien, tu tieng

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky dang tay hoi. hieu van cam duc manh hanh vi ((cau triet) or (((su triet) OR (su tien))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang tay hoi. hieu van cam duc manh hanh vi ((cau triet) OR (((su triet) OR (su tien)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang tay hoi. hieu van cam duc manh hanh vi ((cau triet) or (((su triet) OR (su tien))))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang tay hoi. hieu van cam duc manh hanh vi ((cau triet) or (((su triet) OR (su tien))))*.