Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
ky tang » ky dang, kho tang, ky trong
van hoc » van hoa
hieu va » lieu va, hieu qua
va tinh » may tinh
tinh de » tinh da, sinh de, tinh he
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ky tang) or (ky nang)) van hoc. hieu va cam xuc va tinh de ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky tang) OR (ky nang)) van hoc. hieu va cam xuc va tinh de ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky tang) or (ky nang)) van hoc. hieu va cam xuc va tinh de ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky tang) or (ky nang)) van hoc. hieu va cam xuc va tinh de ((cua tu) OR (cua su))*.