Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
pham xuan » pham luan, pham quang, pham van
toan hang » toan thang, toan hanh, toan mang
qua pham » quan pham, quy pham, qua cham
hang noi » nang noi, hanh noi, dang noi
dua tren » dung tren
nang xa » lang xa, nang ma, mang xa
noi dua » noi da, noi cua, noi dia

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 thieu ((nang xa) OR (nang x)) hoi. hieu qua pham xuan toan hang noi dua tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach thieu ((nang xa) OR (nang x)) hoi. hieu qua pham xuan toan hang noi dua tren".
• Adding a wildcard symbol may retrieve word variants: thuat sach thieu ((nang xa) OR (nang x)) hoi. hieu qua pham xuan toan hang noi dua tren*.