Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
toc sach » hoc sach, doc sach, thuoc sach
cao duoc » tao duoc, co duoc, cao duc
dong xa » dong xay, duong xa, dong ha
hieu va » lieu va, hieu qua
duoc xa » duoc ma, duoc va, duoc ha
xa hanh » xa thanh, xa khanh, va hanh
vai cua » hai cua, lai cua, bai cua
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (thuat sach)) tu dong xa hoi. hieu va cao duoc xa hanh ((vai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuat sach)) tu dong xa hoi. hieu va cao duoc xa hanh ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (thuat sach)) tu dong xa hoi. hieu va cao duoc xa hanh ((vai cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thuat sach)) tu dong xa hoi. hieu va cao duoc xa hanh ((vai cua) OR (dai cua)) tre*.