Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
hanh dao » lanh dao, thanh dat, thanh dam
van hanh » van thanh, ban hanh, van anh
vien cac » vien dai, vien da, gian cac
xuc van » duc van, luc van, vuc van
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
dao cua » dai cua, day cua, dan cua
ma hoi » mai hoi, xa hoi, me hoi
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach tu nang ((ma hoi) or (ma hoa)). hieu ((vien cac) OR (vien bach)) xuc van hanh dao cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach tu nang ((ma hoi) OR (ma hoa)). hieu ((vien cac) OR (vien bach)) xuc van hanh dao cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach tu nang ((ma hoi) or (ma hoa)). hieu ((vien cac) OR (vien bach)) xuc van hanh dao cua tu".
• Adding a wildcard symbol may retrieve word variants: doc sach tu nang ((ma hoi) or (ma hoa)). hieu ((vien cac) OR (vien bach)) xuc van hanh dao cua tu*.