Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dinh dai » dinh dat, sinh dai, dinh dao
hoc sach » hoc sinh, hoc cac, hoc anh
va dinh » van dinh, va kinh, va tinh
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cua tuc » cua duc, cua thuoc, luat tuc
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
cua tu » cua su, cua cu, cua te

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) or (hoc sach)) ky tang xa hoi. hieu ve cac luc va dinh dai ((cua tu) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (hoc sach)) ky tang xa hoi. hieu ve cac luc va dinh dai ((cua tu) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (hoc sach)) ky tang xa hoi. hieu ve cac luc va dinh dai ((cua tu) or (cua tuc))*.