Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
cau tren » cu tren, dau tren, ca tren
sach thu » sach thue, sach thieu, sach tham
va thanh » gia thanh, ban thanh, va tinh
cham tuc » nham thuc, pham thuc, tham thuc
doi cau » doi dau, di cau, doi ca
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, nang ma, mang xa
sach tu » cach tu, sach ty, sach uu
lang xa » lang ha, dang xay, lang van
tuc va » thuc va, truc va, tuc xa

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 thu) or (sach tu)) ((nang xa) or (lang xa)) hoi. hieu va cham tuc va thanh doi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thu) OR (sach tu)) ((nang xa) OR (lang xa)) hoi. hieu va cham tuc va thanh doi cau tren.
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) or (sach tu)) ((nang xa) or (lang xa)) hoi. hieu va cham tuc va thanh doi cau tren*.