Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thu sach » tu sach, thuat sach, thuoc sach
ma thanh » mai thanh, va thanh, ha thanh
thuoc ma » hoc ma, duoc ma
hieu van » hieu va, thien van, lieu va
van lam » van nam
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
ve cua » de cua, te cua, ve cum
le cua » ly cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang ((ma hoi) or (mai hoi)). hieu van lam thuoc ma thanh ((ve cua) or (le cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((ma hoi) OR (mai hoi)). hieu van lam thuoc ma thanh ((ve cua) OR (le cua)) tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((ma hoi) or (mai hoi)). hieu van lam thuoc ma thanh ((ve cua) or (le cua)) tre*.