Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua viet » ca viet, cua vat, cua dieu
van tuan » van quan, van ban, anh tuan
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
tuan vi » quan vi, luan vi, quans vi
va cao » va cac, va dao, va bao
y nang » ky nang, ly nang, v nang
va co » vo co

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y nang xa hoi. hieu ((va cao) OR (va co)) xuc van tuan vi ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang xa hoi. hieu ((va cao) OR (va co)) xuc van tuan vi ((cua viet) OR (hoa viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang xa hoi. hieu ((va cao) OR (va co)) xuc van tuan vi ((cua viet) or (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang xa hoi. hieu ((va cao) OR (va co)) xuc van tuan vi ((cua viet) or (hoa viet))*.