Perhaps you should try some spelling variations:
khap thong » phap thong, khau thong, khac thuong
sach tien » sach thieu
tien thuc » trien thuc, kien thuc, bien thuc
khoa khap » khoa kham, khoa khac, kho khan
sach tren » sach tranh
khoan pho » khoan nhoi, khoan phai, khoan hoi
pho thong » he thong
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
tren phu » tren phan, tren thuc, bien phu
te sach » toc sach
tu sach » thu sach, su sach, tu cach
phu cac » phuc cac, pha cac, phu can

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 tien thuc anh khoa khap thong ) or ( tu sach tren phu cac khoan pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tien thuc anh khoa khap thong ) OR ( tu sach tren phu cac khoan pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tien thuc anh khoa khap thong ) or ( tu sach tren phu cac khoan pho thong ))*.