Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh tri » thanh tri, hanh tai, hanh trinh
van hanh » van thanh, ban hanh, van anh
loc van » luoc van, hoc van, lo van
cam loc » cam lo
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
va cam » va cham, va cac, va cao
cua te » cua tu
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: ((hoc sach) or (te sach)) ky lang xa hoi. hieu va cam loc van hanh tri ((cua te) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (te sach)) ky lang xa hoi. hieu va cam loc van hanh tri ((cua te) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (te sach)) ky lang xa hoi. hieu va cam loc van hanh tri ((cua te) or (cua su))*.