Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va danh, ban hanh
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
di cau » da cau, diem cau
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. hieu ((va cam) or (va cao)) tu ((va hanh) or (va thanh)) di cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. hieu ((va cam) OR (va cao)) tu ((va hanh) OR (va thanh)) di cau tren.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. hieu ((va cam) or (va cao)) tu ((va hanh) or (va thanh)) di cau tren*.