Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thu xang » thu hang, thu bang, thu sang
hanh vai » hanh vi, hanh va, hanh tai
thu dang » thu hang, thu bang, thu dong
vu kham » vu khanh
vai cau » va cau, van cau, vai cac
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
ve cham » va cham, ve chat, vu cham

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 xang) OR (thu dang)) xa hoi. hieu ((ve cham) or (vu kham)) thuc va hanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu xang) OR (thu dang)) xa hoi. hieu ((ve cham) OR (vu kham)) thuc va hanh vai cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu xang) OR (thu dang)) xa hoi. hieu ((ve cham) or (vu kham)) thuc va hanh vai cau tren".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu xang) OR (thu dang)) xa hoi. hieu ((ve cham) or (vu kham)) thuc va hanh vai cau tren*.