Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi nang » thi cong, ki nang, thi hanh
tinh lao » dinh lam, tinh nam, tinh va
chat tuc » chat xuc, luat tuc, chat huu
tinh lai » tinh hai, minh lai, tinh bai
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
tuc va » thuc va, truc va, tuc xa

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 thi nang xa hoi. hieu ve chat tuc va ((tinh lai) OR (tinh lao)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi nang xa hoi. hieu ve chat tuc va ((tinh lai) OR (tinh lao)) ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thi nang xa hoi. hieu ve chat tuc va ((tinh lai) OR (tinh lao)) ((cua tre) or (cuu tre))*".