Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
hoach tai » hoach toi, hoach toan, hoach thay
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
khoa kham » kho khan, khoa than
sach khoa » sach nha, anh khoa, sinh khoa
phu thong » pho thong, phap thong, khau thong
tai thuc » thai thuc, tri thuc, dai thuc
sach bac » sach bai, sach dao, sach xa
hoc sach » hoc sinh, hoc cac, hoc anh
khoa phu » khoa phau, khoa thu, hoa phu
tu sach » thu sach, su sach, te sach
bac hoc » bai hoc, bac ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hoach tai thuc bach khoa kham thong ) or ( tu sach bac hoc sach khoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach tai thuc bach khoa kham thong ) OR ( tu sach bac hoc sach khoa phu thong ))*.