Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tang mai » tang ma, tang tai, sang mai
cham tuc » nham thuc, pham thuc, tham thuc
lang mai » lang dai, lang hai, lang man
te sach » toc sach
va hanh » van hanh, va thanh, va danh
hieu va » hieu qua
cu tren » tu tren, dua tren
tuc va » thuc va, truc va, tuc xa
vi cu » vi su, vi xu, vi du

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 tay ((tang mai) or (lang mai)) hoi. ((hieu va) OR (lieu va)) cham tuc va hanh vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tay ((tang mai) OR (lang mai)) hoi. ((hieu va) OR (lieu va)) cham tuc va hanh vi cu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tay ((tang mai) or (lang mai)) hoi. ((hieu va) OR (lieu va)) cham tuc va hanh vi cu tren".
• Adding a wildcard symbol may retrieve word variants: te sach tay ((tang mai) or (lang mai)) hoi. ((hieu va) OR (lieu va)) cham tuc va hanh vi cu tren*.