Perhaps you should try some spelling variations:
dung tri » dung tai, dung tren, dung sai
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cua te, cuu tre, cua triet
cam tuc » cam xuc, cam tu, dam thuc
ky dang » ky nang, ky danh
va dung » van dung, va duong, vat dung
hieu va » lieu va, hieu qua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, xa hoi, va hoi

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