Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
dua tren » dung tren
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu nano
tuc va » thuc va, truc va, duc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu nang x ho. hieu va cam ((tuc va) OR (tuc xa)) thanh lai ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang x ho. hieu va cam ((tuc va) OR (tuc xa)) thanh lai ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang x ho. hieu va cam ((tuc va) OR (tuc xa)) thanh lai ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang x ho. hieu va cam ((tuc va) OR (tuc xa)) thanh lai ((dua tren) or (cuu tre))*.