Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cac xuc » cam xuc, cac nuoc, chat xuc
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va danh, ban hanh
hieu ve » hieu va, hieu van
sach ky » sac ky, sach ty, sach kem
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa
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 ky) OR (sach y)) nang ma hoi. hieu ve cac xuc ((va hanh) or (va thanh)) vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang ma hoi. hieu ve cac xuc ((va hanh) OR (va thanh)) vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang ma hoi. hieu ve cac xuc ((va hanh) or (va thanh)) vi cua vat".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang ma hoi. hieu ve cac xuc ((va hanh) or (va thanh)) vi cua vat*.