Perhaps you should try some spelling variations:
thuc doanh » thuc hanh, thuc dan, chuc danh
khoa khoa » hoa khoa, khuan khoa, hoc khoa
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
khoa pho » khoa phu, khoa phau, hoc pho
khoa hoc » hoa hoc
vu sach » vu bach, su sach, vu khach

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach tri thuc doanh ((khoa pho) or (((khoa khoa) OR (khoa hoc)))) thong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tri thuc doanh ((khoa pho) OR (((khoa khoa) OR (khoa hoc)))) thong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tri thuc doanh ((khoa pho) or (((khoa khoa) OR (khoa hoc)))) thong".
• Adding a wildcard symbol may retrieve word variants: vu sach tri thuc doanh ((khoa pho) or (((khoa khoa) OR (khoa hoc)))) thong*.