Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
thu sach » thuat sach, thuoc sach, thu hoach
doanh va » doan va, doanh tai, doanh cua
su triet » su viet, su tien, ve triet
tu sach » su sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
cac tu » cac thu, cach tu, cac du
tu vay » tu va, tu van, tu cay

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 (thu sach)) ty nang xa hoi. hieu ve cac tu vay doanh va su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang xa hoi. hieu ve cac tu vay doanh va su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu ve cac tu vay doanh va su triet*.