Perhaps you should try some spelling variations:
thuat tran » thuat trang, thuat toan, thuat than
tran khoa » toan khoa, san khoa, nhan khoa
pho thong » he thong
tri thuat » trien thuat, tri thuc, thu thuat
phu thong » phap thong, khau thong, phan thong
ki thuat » ky thuat
khoa pho » khoa khoa, khoa phau, khoa hoc
sach tri » sach tai, sach tren, sach truc
thuat va » thuyet va, thuat xay, thuat bai
khoa phu » khoa phau, khoa thu, hoa phu
tu sach » thu sach, su sach, te sach
sach ki » sach kinh, sach bai, sach kem
va khoa » vat khoa, van khoa, da khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach ki thuat tran khoa pho thong ) or ( tu sach tri thuat va khoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach ki thuat tran khoa pho thong ) OR ( tu sach tri thuat va khoa phu thong ))*.