Perhaps you should try some spelling variations:
thien cac » thien cau, thieu cac, trien cac
van hanh » van thanh, ban hanh, van anh
hien cac » vien cac, hieu cac, dien cac
sach kem » hanh kem
cua viet » ca viet, hoa viet, cua vat
sang ma » tang ma, nang ma, sang tao
xuc van » duc van, luc van, vuc van
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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 kem) or (sac ky)) sang ma hoi. hieu ((hien cac) OR (thien cac)) xuc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sac ky)) sang ma hoi. hieu ((hien cac) OR (thien cac)) xuc van hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach kem) or (sac ky)) sang ma hoi. hieu ((hien cac) OR (thien cac)) xuc van hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sac ky)) sang ma hoi. hieu ((hien cac) OR (thien cac)) xuc van hanh vi cua viet*.