Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
vu sach » vu bach, su sach, vu khach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
duc gia » quoc gia
doi cua » dai cua, hoi cua
do cua » co cua, de cua, dong cua

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) or (thuat san)) ky tang xa hoi. hieu va cac duc gia thanh ((do cua) OR (doi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (thuat san)) ky tang xa hoi. hieu va cac duc gia thanh ((do cua) OR (doi cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (thuat san)) ky tang xa hoi. hieu va cac duc gia thanh ((do cua) OR (doi cua)) triet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (thuat san)) ky tang xa hoi. hieu va cac duc gia thanh ((do cua) OR (doi cua)) triet*.