Perhaps you should try some spelling variations:
thuat sach » thuat san
thuat lanh » thuat lap, thuat san
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
hoi benh » hoc benh, hoa benh, hoi binh
nhan tai » hang tai, van tai, toan tai
hoc anh » hoc nganh, hoc nhanh, ngoc anh
anh hoa » anh khoa, danh hoa, hanh hoa
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) OR (thuat lanh)) hoc tap, nghien cuu tong hoc anh hoa hoc xa hoi benh nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) OR (thuat lanh)) hoc tap, nghien cuu tong hoc anh hoa hoc xa hoi benh nhan tai".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) OR (thuat lanh)) hoc tap, nghien cuu tong hoc anh hoa hoc xa hoi benh nhan tai*.