Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
toc sach » hoc sach, doc sach, thuoc sach
lang van » dang van, tang van, hoang van
hanh dao » lanh dao, thanh dam, doanh dao
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, luc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (toc sach)) ky lang van hoi. lieu va cam xuc va ((hanh dao) OR (thanh dat)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky lang van hoi. lieu va cam xuc va ((hanh dao) OR (thanh dat)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky lang van hoi. lieu va cam xuc va ((hanh dao) OR (thanh dat)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky lang van hoi. lieu va cam xuc va ((hanh dao) OR (thanh dat)) cuu tre*.