Perhaps you should try some spelling variations:
cham hoc » cham soc, chat hoc, cham hoi
sau benh » phau benh, tai benh, so benh
san benh » tai benh, so benh, gay benh
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
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: te sach o lang xa hoi. hieu va cham hoc ((sau benh) OR (san benh)) vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach o lang xa hoi. hieu va cham hoc ((sau benh) OR (san benh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: te sach o lang xa hoi. hieu va cham hoc ((sau benh) OR (san benh)) vi cua te*.