Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly nang xa hoi. ((hieu ve) or (hieu va)) cham soc ((van hanh) or (gia thanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang xa hoi. ((hieu ve) OR (hieu va)) cham soc ((van hanh) OR (gia thanh)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang xa hoi. ((hieu ve) or (hieu va)) cham soc ((van hanh) or (gia thanh)) vi cua te*.