Perhaps you should try some spelling variations:
thien van » thi van
lang van » dang van, tang van, hoang van
cam thuc » am thuc, nam thuc, can thuc
cau tren » cu tren, dau tren, ca tren
dang xay » dang van, van xay
cam thu » nam thu, cac thu, ca thu
vat dan » va dan, van dan, vat ran
sac ky » cac ky, sai ky
dan va » doan va, dan ca, ban va
va cau » van cau, va cac, va dau
te sac » te sach, te cac, te san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((dang xay) or (lang van)) hoi. thien van ((cam thuc) OR (cam thu)) vat dan va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((dang xay) OR (lang van)) hoi. thien van ((cam thuc) OR (cam thu)) vat dan va cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((dang xay) or (lang van)) hoi. thien van ((cam thuc) OR (cam thu)) vat dan va cau tren*".