Perhaps you should try some spelling variations:
lang thai » lang chai, dang thai, lang hai
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky dang, tay lang
cua tre » cuu tre, cua triet, dua tren
ky tang » ky nang, ky dang, kho tang
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va lang » va nang, hoa lang
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
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 sach ((ky lang) OR (ky tang)) xa hoi. hieu va cam tuc va lang thai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky tang)) xa hoi. hieu va cam tuc va lang thai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) OR (ky tang)) xa hoi. hieu va cam tuc va lang thai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) OR (ky tang)) xa hoi. hieu va cam tuc va lang thai ((cua tre) or (cua te))*.