Perhaps you should try some spelling variations:
sat huong » suat huong, san huong, sat muong
tham thuc » nham thuc, pham thuc, tam thuc
huong doi » huong dan, trong doi, dung doi
thuc sat » thuc vat, thuc san, thuc hoat
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
doi cuu » doi cua, doi cuoc
cuu tre » cua tre, cau tren, cau treo
y nang » ly nang, v nang, may nang
x hoi » xa hoi, o hoi, x ho
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (ky nang)) ((x hoi) or (o hai)). hieu ve tham thuc sat huong doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) ((x hoi) OR (o hai)). hieu ve tham thuc sat huong doi cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ky nang)) ((x hoi) or (o hai)). hieu ve tham thuc sat huong doi cuu tre*.