Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
van hanh » van thanh, ban hanh, van anh
hanh dao » lanh dao, thanh dat, thanh dam
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
dao cua » dai cua, day cua, dan cua
cua tuc » cua duc, cua tu, cua thuoc
lam vo » lam co, lam so, lam vu

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 (vay khach)) ky lang xa hoi. ((hieu van) OR (hieu va)) lam vo van hanh dao cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vay khach)) ky lang xa hoi. ((hieu van) OR (hieu va)) lam vo van hanh dao cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vay khach)) ky lang xa hoi. ((hieu van) OR (hieu va)) lam vo van hanh dao cua tuc".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vay khach)) ky lang xa hoi. ((hieu van) OR (hieu va)) lam vo van hanh dao cua tuc*.