Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
dua tren » dung tren
cham tuc » nham thuc, pham thuc, cham soc
su sach » so sach, vu sach
dan lai » dan loai, dan lap, dan lat
cuu tre » cua tre, cau tren, cau treo
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
hang xa » hoang xa, hang va, hang ca
tu hang » thu hang, tu hanh, tu hung
va dan » ca dan, va dao, va dau

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 tu hang xa hoi. hieu ve ((cham tuc) OR (tham thuc)) va dan lai ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu hang xa hoi. hieu ve ((cham tuc) OR (tham thuc)) va dan lai ((dua tren) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tu hang xa hoi. hieu ve ((cham tuc) OR (tham thuc)) va dan lai ((dua tren) or (cuu tre))*".