Perhaps you should try some spelling variations:
thue sinh » thue tinh, thu sinh, thuoc sinh
sinh hoat » sinh hoc, sinh vat
hanh khoa » hang khoa, anh khoa, hanh hoa
pho thong » he thong
sach bai » sach dao, cac bai, sach xa
bai thue » bai thuyet, bai thuoc, loai thue
hoat hai » soat hai, hoang hai, hoat chat
sach thu » sach thue, sach thieu, sach tham
thi hanh » thi thanh
khoa pho » khoa phu, khoa khoa, khoa phau
te sach » toc sach
tu sach » thu sach, su sach, tu cach
thu thi » thuc thi, thu thai, thuy thi

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 bai thue sinh hoat hai phong ) or ( tu sach thu thi hanh khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach bai thue sinh hoat hai phong ) OR ( tu sach thu thi hanh khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach bai thue sinh hoat hai phong ) or ( tu sach thu thi hanh khoa pho thong ))*.