Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hoc hanh » hoc nhanh, hoc thanh, hoc anh
hanh hoa » thanh hoa, khanh hoa, hang hoa
phan dau » phan tu, hang dau
tu sach » su sach, te sach, tu cach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va phan » van phan, va phat, va phap
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: ((tu sach) or (thu sach)) hoc tap, nghien cuu mon hoc hanh hoa hoc xa hoi va phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) hoc tap, nghien cuu mon hoc hanh hoa hoc xa hoi va phan dau.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) hoc tap, nghien cuu mon hoc hanh hoa hoc xa hoi va phan dau*.