Perhaps you should try some spelling variations:
kham thuc » nham thuc, pham thuc, tham thuc
toc sach » hoc sach, doc sach, thuoc sach
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
thuc va » thuc vat, thuc dan, thuc day
dan dat » dung dat, dong dat, dinh dat
dat cuu » dat cau, dat cua
cuu tre » cua tre, cau tren, cau treo
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ma hoi » mai hoi, ma hoa, me hoi
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v nang ((ma hoi) or (xa hoi)). hieu vu kham thuc va dan dat cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang ((ma hoi) OR (xa hoi)). hieu vu kham thuc va dan dat cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach v nang ((ma hoi) or (xa hoi)). hieu vu kham thuc va dan dat cuu tre*.