Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
thuc day » thuc dan, thuc vat
dua tren » dung tren
thanh va » thanh van, hanh va, thanh ha
cam thuc » am thuc, nam thuc, cam thu
cua tre » cuu tre, cua triet, cua thep
sach ty » sach y, sach tu, sach thu
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cac, va cam
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang xa hoi. hieu ve cam thuc day thanh va ((((cua tre) or (dua tren))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang xa hoi. hieu ve cam thuc day thanh va ((((cua tre) OR (dua tren))) OR (cua te))*.