Perhaps you should try some spelling variations:
dan khanh » dang khanh, van khanh, dat khanh
dan hanh » dang hanh, dan thanh, ban hanh
tu sach » thu sach, su sach, te sach
xang xa » lang xa, mang xa, ang xa
hieu vu » hieu ve, hieu su, dieu vu
hieu va » lieu va, hieu qua
y xang » ty xang
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 y xang xa hoi. ((hieu vu) or (hieu va)) cham soc ((dan khanh) or (dan hanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y xang xa hoi. ((hieu vu) OR (hieu va)) cham soc ((dan khanh) OR (dan hanh)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach y xang xa hoi. ((hieu vu) or (hieu va)) cham soc ((dan khanh) or (dan hanh)) vi cua te*.