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
nang xa » nang x, lang xa, nang ma
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

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 xa 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 xa hoi. hieu ((va cam) OR (va cao)) tu ((va hanh) OR (va thanh)) di cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa 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 xa hoi. hieu ((va cam) OR (va cao)) tu ((va hanh) or (va thanh)) di cau tren*.