Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
doanh van » doan van, doanh va, doanh ban
danh vai » danh sai, danh va, dang van
truc va » thuc va, thuc vat, trung va
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach thu, xach tay
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
cua tre » cua te, cuu tre, cua triet

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 ty) or (sach tu)) nang xa hoi. hieu ve cham truc va ((danh vai) OR (doanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang xa hoi. hieu ve cham truc va ((danh vai) OR (doanh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach tu)) nang xa hoi. hieu ve cham truc va ((danh vai) OR (doanh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) nang xa hoi. hieu ve cham truc va ((danh vai) OR (doanh van)) cua tre*.