Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
khoa kham » kho khan, khoa than
hoc thong » hoc thuong, hoc trong, hoc hong
nha thac » nhan thuc, nha thuoc, khai thac
thac dac » thac cac, thai dac, thach duc
dac khoa » da khoa, dai khoa, dau khoa
khoa hoc » hoa hoc
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
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 nha thac dac khoa hoc thong ) or ( vu sach tri thuc anh khoa kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu sach nha thac dac khoa hoc thong ) OR ( vu sach tri thuc anh khoa kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( vu sach nha thac dac khoa hoc thong ) or ( vu sach tri thuc anh khoa kham thong ))*.