Perhaps you should try some spelling variations:
sinh thai » dinh thi
thu sach » tu sach, thuat sach, thuoc sach
thai cua » than cua, tai cuc, tri cua
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, dan cac
van bac » van ban, van bao, van hac
va sinh » va kinh, va tinh, vi sinh
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. thien ((van cac) or (van bac)) nuoc va sinh thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. thien ((van cac) OR (van bac)) nuoc va sinh thai cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. thien ((van cac) or (van bac)) nuoc va sinh thai cua te*.