Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
toc sach » hoc sach, doc sach, thuoc sach
van quan » van ban
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoc » co hoc, cho hoc, chat hoc
van tai » von tai, van tuan
lap cau » luat cau, phap cau
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: toc sach ty nang cao hoc. hieu ((van tai) or (van quan)) tuc va thanh lap cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang cao hoc. hieu ((van tai) OR (van quan)) tuc va thanh lap cau tren.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang cao hoc. hieu ((van tai) or (van quan)) tuc va thanh lap cau tren*.