Perhaps you should try some spelling variations:
van hoach » van hach, van hoa, van hoc
hoach dat » hoach xay, hoc dat, hoach va
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
sach ky » sac ky, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
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: thuoc ((sach ky) or (sach y)) nang ma hoi. hieu van hoach dat va thanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (sach y)) nang ma hoi. hieu van hoach dat va thanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) or (sach y)) nang ma hoi. hieu van hoach dat va thanh vi cua vat*.