Perhaps you should try some spelling variations:
dat ngoc » dat nuoc, dau ngoc, dang ngoc
tinh ven » trinh ven, tinh yen, sinh vien
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ngoc va » nuoc va, ngoc ha, goc va
va tinh » may tinh
cua tre » cuu tre, cua triet, dua tren
ve dat » de dat, va dat, ve dao
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: te sach ty lang xa hoi. hieu ve dat ngoc va tinh ven ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty lang xa hoi. hieu ve dat ngoc va tinh ven ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach ty lang xa hoi. hieu ve dat ngoc va tinh ven ((cua tre) or (cua te))*.