Perhaps you should try some spelling variations:
khach tai » khach trai, khau tai, khach san
khoan pho » khoan nhoi, khoan phai, khoan hoi
pho thong » he thong
chuc danh » chuc nganh, thuc hanh, chuc nang
danh khoa » doanh khoa, anh khoa, danh hoa
phu thong » phap thong, khau thong, phan thong
vu khach » vu khanh, vu khac, vay khach
tai thuc » thai thuc, tri thuc, dai thuc
thuc cac » thuc cach, tuc cac, phuc cac
sach tri » sach tai, sach tren, sach truc
tri chuc » tri thuc, toi chuc, tri thuoc
khoa phu » khoa phau, khoa thu, hoa phu
su sach » so sach, vu sach

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 tai thuc cac khoan pho thong ) or ( su sach tri chuc danh khoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu khach tai thuc cac khoan pho thong ) OR ( su sach tri chuc danh khoa phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( vu khach tai thuc cac khoan pho thong ) or ( su sach tri chuc danh khoa phu thong ))*.