Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thuat san » thuat toan, thuat song, thuat lanh
hieu van » hieu va, thien van, lieu va
thuoc ma » hoc ma, duoc ma
te sach » toc sach
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
ma hanh » va hanh, da hanh, na hanh
cua tre » cua te, cuu tre, cua triet
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: ((te sach) or (thuat san)) ky tang ma hoi. hieu van nam thuoc ma hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat san)) ky tang ma hoi. hieu van nam thuoc ma hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat san)) ky tang ma hoi. hieu van nam thuoc ma hanh vi cua tre*.