Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
tan hanh » tan thanh, tang hanh, toan hanh
cho hoc » co hoc, khoa hoc
vai cua » dai cua, hai cua, lai cua
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
tu nano » truc nano
tu nang » tru nang, tu nong, tu lang
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac

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) OR (toc sach)) ((tu nang) or (tu nano)) cho hoc. hieu ve cac duc tan hanh vai cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((tu nang) OR (tu nano)) cho hoc. hieu ve cac duc tan hanh vai cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ((tu nang) or (tu nano)) cho hoc. hieu ve cac duc tan hanh vai cua cau*".