Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
phan khong » phan hong, nhan khong, pham khong
vu khach » vu khanh, vay khach, cua khach
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoc phan » hoc dan, hoc pho
thuoc xa » thuoc ma, thuoc va, thuoc la
gian dan » gian lang
vu khac » vu kham, vu khanh, bui khac
ca gian » ca giang, ca giao, va gian
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khach) or (vu khac)) hoc tap, nghien cuu cong hoc phan khong thuoc xa hoi ca gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (vu khac)) hoc tap, nghien cuu cong hoc phan khong thuoc xa hoi ca gian dan.
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (vu khac)) hoc tap, nghien cuu cong hoc phan khong thuoc xa hoi ca gian dan*.