Perhaps you should try some spelling variations:
dat thanh » dao thanh, dat khanh, dang thanh
day thanh » dao thanh, da thanh, dam thanh
su sach » so sach, vu sach
hai cuu » hai cua, hai chu, hai cuc
ve chat » va chat, van chat
sach ty » sach y, sach tu, sach thu
ve nham » ve nha, ve cham
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu ((ve nham) or (ve chat)) thuc ((day thanh) OR (dat thanh)) hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((ve nham) OR (ve chat)) thuc ((day thanh) OR (dat thanh)) hai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ((ve nham) or (ve chat)) thuc ((day thanh) OR (dat thanh)) hai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((ve nham) or (ve chat)) thuc ((day thanh) OR (dat thanh)) hai cuu tre*.