Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh xay » nganh mac, nganh y, nganh ma
cac truc » cau truc, cac tru, cac trung
cau treo » cau theo, cau tren, cau triet
lang ha » long ha
cong ha » cong hoa, dong ha, cong tac
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nganh xay ((lang ha) or (cong ha)) hoi. hieu va cac truc va hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nganh xay ((lang ha) OR (cong ha)) hoi. hieu va cac truc va hanh vi cau treo.
• Adding a wildcard symbol may retrieve word variants: hoc nganh xay ((lang ha) or (cong ha)) hoi. hieu va cac truc va hanh vi cau treo*.