Perhaps you should try some spelling variations:
cay thuoc » cua thuoc, nam thuoc, va thuoc
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
tan hanh » tan thanh, tang hanh, toan hanh
vai cay » va cay, vai cac, vai gay
cam duc » cam xuc, cao duc, pham duc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va
mang xa » lang xa, mang may, dang xay
sach uu » sach luu, sach tu, sach xu

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 ty) or (sach uu)) mang xa hoi. ((hieu ve) OR (hieu van)) cam duc tan hanh vai cay thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach uu)) mang xa hoi. ((hieu ve) OR (hieu van)) cam duc tan hanh vai cay thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach uu)) mang xa hoi. ((hieu ve) OR (hieu van)) cam duc tan hanh vai cay thuoc".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach uu)) mang xa hoi. ((hieu ve) OR (hieu van)) cam duc tan hanh vai cay thuoc*.