Perhaps you should try some spelling variations:
thuoc khanh » thuoc khang, thuoc thanh, thuc hanh
long thuoc » luong thuoc, dong thuoc, khong thuoc
khanh hoa » thanh hoa, hang hoa
thu bach » thi bach, thu sach, thu hoach
cuu long » cuu cong, cuu tong, cuu nang
hoa phan » hoa dan, co phan
phat van » pham van, phan van, hat van
phap van » pham van, phan van, phap han
mai tap » bai tap, mai tat, mai tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu bach mai tap, nghien cuu long thuoc khanh hoa hoc ma hoa phan ((phat van) or (phap van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu bach mai tap, nghien cuu long thuoc khanh hoa hoc ma hoa phan ((phat van) OR (phap van)).
• Adding a wildcard symbol may retrieve word variants: thu bach mai tap, nghien cuu long thuoc khanh hoa hoc ma hoa phan ((phat van) or (phap van))*.