Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
cau tren » dau tren, ca tren, cau treo
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
cu tren » tu tren, dua tren
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang xa hoi. lieu va cau thuc ban hanh vi ((cau tren) OR (cu tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. lieu va cau thuc ban hanh vi ((cau tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. lieu va cau thuc ban hanh vi ((cau tren) OR (cu tren))*.