Perhaps you should try some spelling variations:
doanh va » doan va, doanh tai, doanh cua
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, tu cach
vu kham » vu khanh
ve cham » va cham, ve chat, vu cham
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua

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) OR (te sach)) ly nang xa hoi. hieu ((ve cham) or (vu kham)) luc va doanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ly nang xa hoi. hieu ((ve cham) OR (vu kham)) luc va doanh va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ly nang xa hoi. hieu ((ve cham) or (vu kham)) luc va doanh va cua tre*".