Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
xuc tuan » duc thuan, quoc tuan, xuan tuan
hanh va » hang va, hanh vi
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
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: toc sach ((tu nang) OR (tu nano)) cho hoc. hieu ve cac xuc tuan ((anh va) or (hanh va)) cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tu nang) OR (tu nano)) cho hoc. hieu ve cac xuc tuan ((anh va) OR (hanh va)) cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((tu nang) OR (tu nano)) cho hoc. hieu ve cac xuc tuan ((anh va) or (hanh va)) cua cau*".