Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
van chat » cao chat
hanh vai » hanh vi, hanh va, hanh tai
vai cau » va cau, van cau, vai cac
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co 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: so sach ty ((xang x) or (nang x)) hoi. hieu ((ve cam) or (van chat)) thuc va hanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((xang x) OR (nang x)) hoi. hieu ((ve cam) OR (van chat)) thuc va hanh vai cau tren.
• Adding a wildcard symbol may retrieve word variants: so sach ty ((xang x) or (nang x)) hoi. hieu ((ve cam) or (van chat)) thuc va hanh vai cau tren*.