Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
luan thuc » dan thuc, nhan thuc, toan thuc
cau treo » cau theo, cau tren, cau triet
lieu vay » lieu va, lieu xay, lieu van
vay luan » ly luan, von luan, bai luan
nang ma » tang ma, sang ma, nang cao
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
nang xa » nang x, lang xa, mang xa
cu tren » tu tren, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y ((nang xa) or (nang ma)) hoi. lieu vay luan thuc va hanh vi ((cau treo) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang xa) OR (nang ma)) hoi. lieu vay luan thuc va hanh vi ((cau treo) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang xa) or (nang ma)) hoi. lieu vay luan thuc va hanh vi ((cau treo) or (cu tren))*.