Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cam » van nam, van lam, van cau
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
xa hanh » xa thanh, xa khanh, da hanh
cam tuc » cam xuc, cam tu, nam thuc
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
ke mang » ke nang, ke trang
ky mang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren, cau treo

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 mang) or (ke mang)) mai hoi. hieu van cam tuc ((xa hanh) OR (va hanh)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky mang) OR (ke mang)) mai hoi. hieu van cam tuc ((xa hanh) OR (va hanh)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky mang) or (ke mang)) mai hoi. hieu van cam tuc ((xa hanh) OR (va hanh)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky mang) or (ke mang)) mai hoi. hieu van cam tuc ((xa hanh) OR (va hanh)) vai cuu tre*.