Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach kem
xuc van » duc van, luc van, xuc ban
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, mang may
sach ty » sach y, sach tu, sach thu
ve cac » va cac, vien cac
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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