Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
thu sach » tu sach, thuat sach, thuoc sach
dinh dai » dinh dat, sinh dai, dinh dao
dua tren » dung tren
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ca » hieu cac, hieu cua, hieu va
ca chat » cao chat, cac chat, va chat
truc va » thuc va, thuc vat, trung va
va dinh » van dinh, va kinh, va tinh
cua tre » cuu tre, cua triet, cua thep
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: thu sach ky nang xa hoi. hieu ca chat truc va dinh dai ((((cua tre) OR (dua tren))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ca chat truc va dinh dai ((((cua tre) OR (dua tren))) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu ca chat truc va dinh dai ((((cua tre) OR (dua tren))) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ca chat truc va dinh dai ((((cua tre) OR (dua tren))) or (cua te))*.