Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
sang cho » danh cho, dung cho, sang tao
cac vung » cac chung, cach dung, cac tuong
sach ty » sach y, sach tu, sach thu
cac ung » cac chung, cac cong, cac dang
cua cau » cua cac, cua chu, cua cay
cac vuc » cac nuoc, cac cuoc, cac quoc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
ty sang » ty xang, ty hang, duy sang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ty sang cho hoc. hieu ve ((cac vuc) or (((cac vung) OR (cac ung)))) van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty sang cho hoc. hieu ve ((cac vuc) OR (((cac vung) OR (cac ung)))) van hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty sang cho hoc. hieu ve ((cac vuc) or (((cac vung) OR (cac ung)))) van hanh vi cua cau*".