Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
va triet » va thiet, va trien, ve triet
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve nham » ve nha, ve cham
thuc va » thuc vat, thuc dan, thuc day
va doan » va doanh, van doan, va dan
doan vu » doan va, doan vi, doan tu
tu sach » thu sach, su sach, tu cach
vu va » vu van, tu va, su va

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))) or (thu hoach)) ky lang xa hoi. hieu ve nham thuc va doan vu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (te sach))) OR (thu hoach)) ky lang xa hoi. hieu ve nham thuc va doan vu va triet.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (te sach))) or (thu hoach)) ky lang xa hoi. hieu ve nham thuc va doan vu va triet*.