Perhaps you should try some spelling variations:
giai thanh » gia thanh, gian thanh, giay thanh
thanh lai » thanh hai, thanh lap, thanh loi
dua tren » dung tren
te sach » toc sach
ve cham » va cham, ve chat, vu cham
cham so » cham soc, cham o, ham so
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
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: te sach ty nang ((mai hoi) OR (dai hoi)). hieu ve cham so giai thanh lai ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((mai hoi) OR (dai hoi)). hieu ve cham so giai thanh lai ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((mai hoi) OR (dai hoi)). hieu ve cham so giai thanh lai ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((mai hoi) OR (dai hoi)). hieu ve cham so giai thanh lai ((dua tren) or (cuu tre))*.