Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
nang ma » tang ma, sang ma, nang cao
van hai » van ha, van chat, van hanh
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
su cao » cu cao, vu cao, su co
va hai » va chai, va khai, va bai
luc va » duc va, tuc va, loc va
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: ((su cao) or (tu cac)) ky nang ma hoa. hieu ((va hai) or (van hai)) luc va hanh ve cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cao) OR (tu cac)) ky nang ma hoa. hieu ((va hai) OR (van hai)) luc va hanh ve cau tren.
• Adding a wildcard symbol may retrieve word variants: ((su cao) or (tu cac)) ky nang ma hoa. hieu ((va hai) or (van hai)) luc va hanh ve cau tren*.