Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
hanh tri » thanh tri, hanh tai, hanh trinh
hieu va » lieu va, hieu qua
ky sang » ky nang, ky dang, ky tang
lap hoi » lap doi, lai hoi, lap hai
hieu ve » hieu van
thuc va » thuc vat, thuc dan, thuc day
tu sac » tu sach, tu cac, tu san
tuc va » truc va, tuc xa, duc va
sac ky » cac 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 sang lap hoi. ((hieu ve) OR (hieu va)) cham ((tuc va) or (thuc va)) hanh tri cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang lap hoi. ((hieu ve) OR (hieu va)) cham ((tuc va) OR (thuc va)) hanh tri cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang lap hoi. ((hieu ve) OR (hieu va)) cham ((tuc va) or (thuc va)) hanh tri cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang lap hoi. ((hieu ve) OR (hieu va)) cham ((tuc va) or (thuc va)) hanh tri cua te*.