Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
dau tren » dau tien, dat tren, dau tieng
thuc ban » thuoc ban, thuc dan, thu ban
va chat » van chat, va phat, cao chat
vai dau » va dau, van dau, xvii dau
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ve cam » ve cham, ve cac, va cam

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 ty ((xang x) or (nang x)) hoi. hieu ((ve cam) or (va chat)) thuc ban thanh vai dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((xang x) OR (nang x)) hoi. hieu ((ve cam) OR (va chat)) thuc ban thanh vai dau tren.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((xang x) or (nang x)) hoi. hieu ((ve cam) or (va chat)) thuc ban thanh vai dau tren*.