Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
khoan kham » khoa kham, khoanh khac, khoan cam
sach tren » sach tien, sach tranh
phu thong » pho thong, phap thong, khau thong
cac khoa » cac khoi, dac khoa, cao khoa
khoa phu » khoa phau, khoa thu, hoa phu
sach dao » lanh dao
te sach » toc sach
tren tu » tren tau, tran tu, tre tu
dao tuc » dao duc
tuc cac » tich cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach tren tu cac khoa phu thong ) or ( te sach dao tuc cac khoan kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tren tu cac khoa phu thong ) OR ( te sach dao tuc cac khoan kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tren tu cac khoa phu thong ) or ( te sach dao tuc cac khoan kham thong ))*.