Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
ba dinh » va dinh, xac dinh, nam dinh
bai cua » ban cua, dai cua, bai ca
tuc ba » tuc bao, tuc xa, tuc va
ba cua » ban cua, bao cua, bat cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu khach)) ky nang xa hoi. hieu va cac tuc ba dinh ((ba cua) OR (bai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) ky nang xa hoi. hieu va cac tuc ba dinh ((ba cua) OR (bai cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu khach)) ky nang xa hoi. hieu va cac tuc ba dinh ((ba cua) OR (bai cua)) triet*".