Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc va » thuc vat, thuc dan, thuc day
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, dua tren
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
tuc va » truc va, tuc xa, duc va

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