Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
cau tren » cu tren, dau tren, ca tren
lang van » dang van, tang van, hoang van
hanh dao » lanh dao, thanh dam, doanh dao
toc sach » hoc sach, doc sach, thuoc sach
ky lang » ky nang, ky dang, ky tang
van hoi » van hoa, van hoc, van hoe
cam duc » cam xuc, cao duc, pham duc
tu sach » thu sach, su sach, te sach
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 duc va ((hanh dao) or (thanh dat)) cau tren~.
• 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 duc va ((hanh dao) OR (thanh dat)) cau tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky lang van hoi. lieu va cam duc va ((hanh dao) or (thanh dat)) cau tren*.