Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, vuc van
luu van » cuu van, luan van, luu hanh
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
ve cac » va 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 ky nang x ho. hieu ((ve cac) OR (vien cac)) ((xuc van) or (luu van)) hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x ho. hieu ((ve cac) OR (vien cac)) ((xuc van) OR (luu van)) hanh tai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x ho. hieu ((ve cac) OR (vien cac)) ((xuc van) or (luu van)) hanh tai cuu tre*".