Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
te sach » toc sach
y nang » ky nang, ly nang, v nang
va dao » ca dao
va cuu » va chu, va huu
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang x hoi. lieu ((va co) or (va dao)) thuc dan hanh ((va cuu) OR (va cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. lieu ((va co) OR (va dao)) thuc dan hanh ((va cuu) OR (va cau)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. lieu ((va co) or (va dao)) thuc dan hanh ((va cuu) OR (va cau)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. lieu ((va co) or (va dao)) thuc dan hanh ((va cuu) OR (va cau)) tre*.