Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hoang xa » hoang ha, hoang va, hoang xuan
va thanh » gia thanh, ban thanh, va tinh
dau tren » dau tien, dat tren, dau tieng
sach ty » sach tu, sach thu, xach tay
qua cac » cua cac
cac soc » cac toc, cac hoc, cham soc
cuu tre » cua tre, cau tren, cau treo
soc va » hoc va, loc va, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ty) OR (sach y)) hoang xa hoi. hieu qua cac soc va thanh vai ((cuu tre) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ty) OR (sach y)) hoang xa hoi. hieu qua cac soc va thanh vai ((cuu tre) OR (dau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ty) OR (sach y)) hoang xa hoi. hieu qua cac soc va thanh vai ((cuu tre) or (dau tren))".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ty) OR (sach y)) hoang xa hoi. hieu qua cac soc va thanh vai ((cuu tre) or (dau tren))*.