Perhaps you should try some spelling variations:
thien van » thi van
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
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: tu sach ly nang xa hoi. ((thien van) or (hieu va)) cham soc ((van hanh) or (gia thanh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang xa hoi. ((thien van) OR (hieu va)) cham soc ((van hanh) OR (gia thanh)) vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang xa hoi. ((thien van) or (hieu va)) cham soc ((van hanh) or (gia thanh)) vi cua tu*.