Perhaps you should try some spelling variations:
dung thai » duong thai, dung tai, dung hai
nam thuc » nam thuoc, am thuc, nam thu
thai cua » than cua, tai cuc, tri cua
cam tuc » cam xuc, cam tu, dam thuc
dang ha » dong ha, dung ha, lang ha
hieu va » lieu va, hieu qua
va dung » van dung, va duong, vat dung
sac ky » sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) OR (cac ky)) dang ha noi. hieu va ((cam tuc) or (nam thuc)) va dung thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) dang ha noi. hieu va ((cam tuc) OR (nam thuc)) va dung thai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (cac ky)) dang ha noi. hieu va ((cam tuc) or (nam thuc)) va dung thai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (cac ky)) dang ha noi. hieu va ((cam tuc) or (nam thuc)) va dung thai cua te*.