Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
tu sach » thu sach, su sach, te sach
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
truc va » thuc va, thuc vat, trung va
dau thi » cau thi, dan thi, dao thi
thi cuu » thi cuc, thi huu, thi cu
cuu tre » cua tre, cau tren, cau treo
y lang » o lang, _ lang, yen lang
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: tu sach ((y lang) OR (tay lang)) xa hoi. hieu ((van cac) or (van cau)) truc va dau thi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y lang) OR (tay lang)) xa hoi. hieu ((van cac) OR (van cau)) truc va dau thi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y lang) OR (tay lang)) xa hoi. hieu ((van cac) or (van cau)) truc va dau thi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y lang) OR (tay lang)) xa hoi. hieu ((van cac) or (van cau)) truc va dau thi cuu tre*.