Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
khai dung » khai ung, hai dung, kha dung
dau khai » dau khi, dan khai, dau hai
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
cau tuc » cau truc, cau tu, cau luc
ma hoi » mai hoi, xa hoi, ma hoa
va cau » van cau, va cac, va cao
tuc va » thuc va, truc va, tuc xa
va dau » 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: ((su sach) or (so sach)) ky nang ma hoi. lieu va cau tuc va dau khai dung tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang ma hoi. lieu va cau tuc va dau khai dung tren*.