Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
va chat » van chat, va phat, cao chat
ve cham » va cham, ve chat, vu cham
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
vi cau » va cau, ve cau, di cau
tu sac » tu sach, tu cac, tu san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ((ky lang) OR (ky dang)) ha noi. hieu ((ve cham) or (va chat)) hoc va tinh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky lang) OR (ky dang)) ha noi. hieu ((ve cham) OR (va chat)) hoc va tinh vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky lang) OR (ky dang)) ha noi. hieu ((ve cham) or (va chat)) hoc va tinh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky lang) OR (ky dang)) ha noi. hieu ((ve cham) or (va chat)) hoc va tinh vi cau tren*.