Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
doanh van » doan van, doanh va, doanh ban
vay doanh » van doanh, ly doanh, voi doanh
cau tren » dau tren, ca tren, cau treo
thu sach » thuat sach, thuoc sach, thu hoach
thuc vay » thuc vat, thuc day, thuc va
tu sach » su sach, te sach, tu cach
va nham » va cham, va tham, va nha
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
cu tren » tu tren, dua tren
ma hoi » mai hoi, xa hoi, ma hoa

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)) ky nang ma hoi. hieu va nham thuc vay doanh van ((cau tren) OR (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu va nham thuc vay doanh van ((cau tren) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang ma hoi. hieu va nham thuc vay doanh van ((cau tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang ma hoi. hieu va nham thuc vay doanh van ((cau tren) OR (cu tren))*.