Perhaps you should try some spelling variations:
thien van » thi van
vat tinh » sat tinh, vat sinh, hoat tinh
hac thuc » hoc thuc, ha thuc, thach thuc
bo sach » co sach, hoc sach
cuu tre » cua tre, cau tren, cau treo
tinh vi » trinh vi, tinh voi, tinh va
van hac » van hoc, van ha, van hai
nang xa » nang x, lang xa, nang ma
lo nang » ho nang, ly nang, loai nang
ca tren » cau tren, cu tren, la tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((bo sach) or (hoc sinh)) lo nang xa hoi. thien van hac thuc vat tinh vi ((cuu tre) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (hoc sinh)) lo nang xa hoi. thien van hac thuc vat tinh vi ((cuu tre) OR (ca tren)).
• Adding a wildcard symbol may retrieve word variants: ((bo sach) or (hoc sinh)) lo nang xa hoi. thien van hac thuc vat tinh vi ((cuu tre) or (ca tren))*.