Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
vu cham » vu kham, tu cham, qua cham
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
va cham » va chat, va tham
tu sach » thu sach, su sach, te sach
ve chat » va chat, van chat
nang co » nang cao, nang doc, nang noi
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang co hoc. hieu ((ve chat) or (((vu cham) or (va cham)))) luc va danh va dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang co hoc. hieu ((ve chat) OR (((vu cham) OR (va cham)))) luc va danh va dau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang co hoc. hieu ((ve chat) or (((vu cham) or (va cham)))) luc va danh va dau tren*.