Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
cam thuc » am thuc, nam thuc, cam thu
cau treo » cau theo, cau tren, cau trieu
tinh hai » tinh thai, tinh chat, trinh han
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
va tinh » may tinh
thuc va » thuc vat, thuc dan, thuc day
sach ly » sach lo, sach ty, sach hay
mai hoi » mai khoi, dai hoi, lai hoi
van cam » van nam, van lam, van cau

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 ly) or (sach y)) nang mai hoi. hieu van cam thuc va tinh hai ((cau treo) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach y)) nang mai hoi. hieu van cam thuc va tinh hai ((cau treo) OR (cau triet)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) or (sach y)) nang mai hoi. hieu van cam thuc va tinh hai ((cau treo) or (cau triet))*.