Perhaps you should try some spelling variations:
thuat sach » thuat lanh
thuat san » thuat toan, thuat song, thuat lanh
hanh vai » hanh va, hanh tai, hanh van
hieu ve » hieu va, hieu van
cau tuc » cau truc, cau tu, cau luc
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) OR (thuat san)) ky nang x ho. hieu ve cau tuc xa ((hanh vai) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat san)) ky nang x ho. hieu ve cau tuc xa ((hanh vai) OR (hanh vi)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) OR (thuat san)) ky nang x ho. hieu ve cau tuc xa ((hanh vai) or (hanh vi)) cua tre*".